ERROR.RUN

************************************************************************
*----------------------------------------------------------------------*
*                                                                      *
*                                                                      *
*               H Y P L A S  ERROR/WARNING MESSAGES                    *
*                                                                      *
*                                                                      *
*----------------------------------------------------------------------*
************************************************************************
*                                                                      *
*                                                                      *
*  Summary:                                                            *
*  --------                                                            *
*                                                                      *
*      This file contains all  HYPLAS  error messages printed by       *
*      calling subroutine  ERRPRT (note that some messages printed by  *
*      HYPLAS  are not issued through  ERRPRT).  Whenever  ERRPRT  is  *
*      called, the error code character string passed as argument will *
*      be searched for in the present file. If the error code string   *
*      is found,  ERRPRT  will print the associated message to the     *
*      results file and standard output and will take the appropriate  *
*      measure (either leave  HYPLAS  running or abort its execution)  *
*      associated with the error code (see "Error code convention"     *
*      section below for details).                                     *
*                                                                      *
*      This file is expected (by  ERRPRT) to be kept in the directory  *
*      defined by the  HYPLASHOME  environment variable.               *
*                                                                      *
*      An entry in the present file has the following format:          *
*                                                                      *
*                                                                      *
*      <code_character_string>   <number_of_lines>                     *
*      ............................................................    *
*      ............................................................    *
*      .............                             ..................    *
*      .............   <error/warning  message>  ..................    *
*      ............................................................    *
*      ............................................................    *
*                                                                      *
*                                                                      *
*      where <code_character_string> is a character string of the      *
*      types discussed in the Error code convention section below,     *
*      <number_of_line> is the integer defining the number of lines    *
*      below the line containing <code_character_string> and           *
*      <number_of_lines> which will be printed as error/warning        *
*      message.                                                        *
*                                                                      *
*      To add a new error/warning message, you may create a completely *
*      new entry defining a new <code_character_string> with the       *
*      corresponding message or, alternatively, you may re-use a       *
*      currently unused <code_character_string> and edit the           *
*      corresponding message.  In doing so, make sure you follow the   *
*      "error code convention" below so that other users will have a   *
*      better idea of what is going on when error/warning messages are *
*      issued by HYPLAS.                                               *
*                                                                      *
*                                                                      *
*  Error code convention:                                              *
*  ----------------------                                              *
*                                                                      *
*                                                                      *
*      ED???? -> Errors of input data:                                 *
*                For fatal errors detected in the input data file.     *
*                Execution of HYPLAS is stopped by subroutine ERRPRT.  *
*                                                                      *
*      WD???? -> Input data warnings:                                  *
*                For unusual non-fatal data in the input data file     *
*                of which the user should be warned.                   *
*                Execution of HYPLAS is NOT STOPPED by subroutine      *
*                ERRPRT.                                               *
*                                                                      *
*      EI???? -> Internal errors:                                      *
*                For errors in the code. Likely to happen during code  *
*                development. Execution of HYPLAS is stopped by        *
*                subroutine ERRPRT.                                    *
*                Example: Subroutine calls with unacceptable arguments.*
*                                                                      *
*      EE???? -> Execution errors:                                     *
*                For fatal errors occuring during the execution of     *
*                HYPLAS such as division by zero, algorithm failures,  *
*                etc. May require re-definition of the problem         *
*                analysed. Execution of HYPLAS is stopped by           *
*                subroutine ERRPRT.                                    *
*                                                                      *
*      WE???? -> Execution warnings:                                   *
*                For non-fatal errors or circumstances, of which       *
*                the user should be warned. Execution of HYPLAS is     *
*                NOT stopped by subroutine ERRPRT.                     *
*                Example: failure of return mapping algorithms for     *
*                elasto-plastic materials.                             *
*                                                                      *
************************************************************************
*
*-----------------------------------------------------------------------
*                                                                      |
*                                                                      |
*                       ERRORS IN INPUT DATA                           |
*                                                                      |
*                                                                      |
*-----------------------------------------------------------------------

ED0001   3
 Description:  The specified total number of elements is less than or
               equal to zero.
 Action:       Correct input data file and re-run HYPLAS.

ED0002   6
 Description:  The specified total number of elements is greater than
               the maximum allowed number.
 Action:       If the specified number of elements is correct, change
               the parameter MELEM in file MAXDIM.INC (MELEM must be
               greater than or equal the required number of elements),
               re-compile and re-run HYPLAS.

ED0003   3
 Description:  The specified total number of nodes is less than or
               equal to zero.
 Action:       Correct input data file and re-run HYPLAS.

ED0004   6
 Description:  The specified total number of nodes is greater than the
               maximum allowed number.
 Action:       If the specified number of nodes is correct, change the
               parameter MPOIN in file MAXDIM.INC (MPOIN must be
               greater than or equal the required number of nodes),
               re-compile and re-run HYPLAS.

ED0005   2
 Description:  Flying structure. No constrained nodes specified.
 Action:       Correct the input data file  and re-run HYPLAS.

ED0006   6
 Description:  The specified number of restrained nodes is greater than
               the maximum allowed number.
 Action:       If the specified number of restrained nodes is correct,
               change the parameter MVFIX in file MAXDIM.INC (MVFIX
               must be grater than or equal the number of restrained
               nodes), re-compile and re-run HYPLAS.

ED0007   6
 Description:  Invalid specification of material type identification
               number.
 Action:       Correct input data file and re-run HYPLAS. Material type
               identification numbers (defined in the materials
               specification section) must be greater than 0 and less
               than or equal the specified number of element groups.

ED0008   5
 Description:  Invalid specification of numerical integration rule for
               element of type QUAD_8.
 Action:       Correct input data file and re-run HYPLAS. Only 1, 4, 5
               and 9 gauss point integration rules are allowed for this
               type of element.

ED0009   6
 Description:  Analysis type flag not acceptable.
 Action:       Correct input data file. The acceptable analysis type
               flags are:
                            1 - for plane stress;
                            2 - for plane strain;
                            3 - for axisymmetric problems.

ED0010   11
 Description:  Solution algorithm flag not acceptable.
 Action:       Correct input data file. The acceptable solution
               algorithm flags are:
                          1 - Initial stiffness method;
                          2 - Newton-Raphson tangent stiffness method;
                          3 - Modified Newton KT1;
                          4 - Modified Newton KT2;
                          5 - Secant Newton - Initial stiffness;
                          6 - Secant Newton - KT1;
                          7 - Secant Newton - KT2,
               with negative values for combined Arc-length method.

ED0011   7
 Description:  Error in definition of distributed edge loading.
               Specified number of nodes in loaded edge is not
               compatible with the type of the associated element.
 Action:       Correct input data file and re-run HYPLAS. Make sure the
               set of nodes with prescribed pressure loading matches
               exactly one and only one of the boundaries of the
               associated element.

ED0012   7
 Description:  Specified set of global node numbers with prescribed
               distributed edge load does not match any boundary of
               the specified element.
 Action:       Correct input data file and re-run HYPLAS. Any set of
               nodes with prescribed distributed edge loading must
               match exactly one and only one of the boundaries of
               the associated element.

ED0013   4
 Description:  The specified number of prescribed load increments is
               less than or equal to 0.
 Action:       Correct input data file (number of increments must be
               greater than 0) and re-run HYPLAS.

ED0014   5
 Description:  Large strain formulation flag not acceptable.
 Action:       Correct the input data file (the large strain flag, that
               follows keyword LARGE_STRAIN_FORMULATION, must be either
               'OFF', for small strain formulation, or 'ON', for large
               strain formulation) and re-run HYPLAS.

ED0015   3
 Description:  Material type name not recognised (possible mispelling).
 Action:       Correct the input data file. Check the source code of
               routine MATIRD for currently acceptable names.

ED0016   4
 Description:  Axis of symmetry not defined.
 Action:       Correct the input data file (the axis of symmetry must be
               defined after keyword AXIS_OF_SYMMETRY as either X or Y)
               and re-run HYPLAS.

ED0017   4
 Description:  Axis of symmetry not acceptable.
 Action:       Correct the input data file (the axis of symmetry,
               defined after keyword AXIS_OF_SYMMETRY, must be either
               X or Y) and re-run HYPLAS.
ED0018   3
 Description:  Analysis type flag not defined.
 Action:       Correct input data file and re-run HYPLAS. The analysis
               type flag must be defined after keyword ANALYSIS_TYPE.

ED0019   3
 Description:  Error in definition of edge loading (pressure). Pressure
               loading has been defined for an inexistent element.
 Action:       Correct input data file and re-run HYPLAS.

ED0020   3
 Description:  Error in definition of edge loading (pressure). Pressure
               loading has been defined for an inexistent global node.
 Action:       Correct input data file and re-run HYPLAS.

ED0021   4
 Description:  Solution algorithm not defined.
 Action:       Correct input data file and re-run HYPLAS. The solution
               algorithm flag must be defined after keyword
               SOLUTION_ALGORITHM.

ED0022   4
 Description:  Large strain formulation flag not defined.
 Action:       Correct input data file and re-run HYPLAS. The large
               strain formulation flag must be defined immediately
               after keyword LARGE_STRAIN_FORMULATION.

ED0023   3
 Description:  Total number of elements not specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               elements must follow keyword ELEMENTS.

ED0024   3
 Description:  Total number of nodes not specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               nodes must follow keyword NODE_COORDINATES.

ED0025   5
 Description:  Number of nodes with prescribed displacements not
               specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               nodes with prescribed displacements must follow keyword
               NODES_WITH_PRESCRIBED_DISPLACEMENTS.

ED0026   4
 Description:  Number of Master/Slave sets not specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               master/slave sets (0 if no master/slave constraints are
               defined) sets must follow keyword MASTER_SLAVE_SETS.

ED0027   3
 Description:  Number of different materials not specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               materials must be follow keyword MATERIALS.

ED0028   5
 Description:  Blank line in materials properties input section.
 Action:       Correct input data file and re-run HYPLAS. Blank lines
               are not allowed in materials properties input section
               beginning in the line immediately after keyword
               MATERIALS.

ED0029   4
 Description:  Materials properties not correctly specified.
 Action:       Correct input data file and re-run HYPLAS. A material
               number followed by its name was expected in the last
               line read.

ED0030   6
 Description:  Load type name not recognised (possible mispelling).
 Action:       Correct input data file and re-run HYPLAS. The
               acceptable load type names are:
                                    POINT;
                                    EDGE;
                                    GRAVITY.

ED0031   3
 Description:  Number of nodes with point load not specified.
 Action:       Correct input data file and re-run HYPLAS. The mumber of
               nodes with point load must be follow keyword POINT_LOADS.

ED0032   3
 Description:  Number loaded edges not specified.
 Action:       Correct input data file and re-run HYPLAS. The mumber of
               loaded edges must be follow keyword EDGE_LOADS.

ED0033   5
 Description:  Invalid specification of numerical integration rule for
               element of type QUAD_4.
 Action:       Correct input data file and re-run HYPLAS. Only 1 and 4
               gauss point integration rules are allowed for this type
               of element.

ED0034   5
 Description:  Number of prescribed load increments not specified.
 Action:       Correct input data file and re-run HYPLAS. When
               incrementation control with fixed load increments is
               selected, the total number of prescribed load increments
               must follow keyword INCREMENTS.

ED0035   6
 Description:  The specified number of load increments is greater
               than the maximum allowed number.
 Action:       If the specified number of load increments is correct,
               change the parameter MINCS in file MAXDIM.INC (MINCS
               must be greater than or equal the specified number of
               load increments) re-compile and re-run HYPLAS.

ED0036   3
 Description:  The specified number of master/slave sets is negative.
 Action:       Correctthe input data file and re-run HYPLAS. The number
               of master/slave sets must be greater than or equal to 0.

ED0037   8
 Description:  Element with invalid group identification number. Last
               element group identification number read is less than or
               equal to 0 or greater than the specified number of
               groups.
 Action:       Correct input data file and re-run HYPLAS. Element group
               identification numbers must be greater than zero and
               less than or equal the specified number of element
               groups.

ED0038   6
 Description:  Invalid node number in connectivity list. One or more
               nodal connection numbers are less than or equal to 0 or
               greater than the specified total number of nodes.
 Action:       Correct input data file and re-run HYPLAS. Existing node
               numbers are greater than 0 and less than or equal to the
               specified total number of nodes.

ED0039   4
 Description:  Repeated node numbers.  One or more elements have
               repetitions of the same node number within the element.
 Action:       Correct node connectivities in input data file and
               re-run HYPLAS.

ED0040   5
 Description:  Unused nodes.  Node numbers that exist in the list of
               nodal points do not appear anywhere in the list of
               elements connectivities.
 Action:       Correct node numbering and/or connectivities in input
               data file and re-run HYPLAS.

ED0041   7
 Description:  Frontwidth too large. The largest frontwidth encountered
               in the present problem exceeds the maximum value
               allowed.
 Action:       Change the parameter MFRON in file MAXDIM.INC (MFRON
               must be greater than or equal the required frontwidth -
               see results file for exact frontwidth size), re-compile
               and re-run HYPLAS.

ED0042   6
 Description:  Invalid restrained node number. One or more node with
               prescribed displacement have node numbers less than or
               equal to zero or greater than the specified total number
               of nodes in the problem.
 Action:       Correct constrained node numbers and/or delete invalid
               constraints and re-run HYPLAS.

ED0043   4
 Description:  Repeated restrained nodes.  Repetitions in the list of
               nodes with prescribed displacements have been detected.
 Action:       Eliminate repetitions from input data file and re-run
               HYPLAS.

ED0044   6
 Description:  Invalid specification of material property
               identification number.
 Action:       Correct input data file and re-run HYPLAS. Material
               identification numbers (defined in material properties
               input section) must be greater than 0 and less than or
               equal the specified number of different materials.

ED0045   6
 Description:  Repeated specification of material property
               identification number. 
 Action:       Correct input data file and re-run HYPLAS. Each material
               identification number (defined in material properties
               input section) and the corresponding material properties
               must be specified only once.

ED0046   7
 Description:  Incorrect element number. An element with identification
               number less than or equal to 0 or greater than the
               specified total number of elements has been detected.
 Action:       Correct input data file and re-run HYPLAS. Element
               numbers must be greater than 0 and less than or equal
               to the specified total number of elements in the
               structure.

ED0047   4
 Description:  Repeated specification of an element.
 Action:       Delete repeated element or correct its number in the
               element list of the input data file and re-run HYPLAS.
               Elements must be defined only once.

ED0048   6
 Description:  Unacceptable number of restrained nodes. The specified
               number nodes with prescribed displacements is greater
               than the specified total number of nodes.
 Action:       Correct input data file and re-run HYPLAS. The number of
               nodes with prescribed displacements must be less than or
               equal to the specified total number of nodes.

ED0049   5
 Description:  Mesh not properly defined. The specified number of nodes
               in the structure is greater than the possible maximum
               total number of nodes (given by the specified number of
               elements times the number of nodes per element).
 Action:       Correct input data file and re-run HYPLAS.

ED0050   6
 Description:  Error in the specification of Master/Slave kinematical
               constraints. A slave node has been assigned to more than
               one master/slave set with its first degree of freedom
               constrained.
 Action:       Correct Master/Slave constraint specification in input
               data file and re-run HYPLAS.

ED0051   6
 Description:  Error in the specification of Master/Slave kinematical
               constraints. A slave node has been assigned to more than
               one master/slave set with its second degree of freedom
               constrained.
 Action:       Correct Master/Slave constraint specification in input
               data file and re-run HYPLAS.

ED0052   3
 Description:  Number of element groups not specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               element groups must be follow keyword ELEMENT_GROUPS.

ED0053   3
 Description:  The specified number of element groups is less than 1. 
 Action:       Correct input data file (at least 1 element group must
               be defined) and re-run HYPLAS.

ED0054   6
 Description:  The specified number of element groups exceeds the
               maximum allowed number.
 Action:       If the specified number of element groups is correct,
               change the parameter MGRUP in file MAXDIM.INC (MGRUP
               must be greater than or equal the specified number of
               element groups) re-compile and re-run HYPLAS.

ED0055   3
 Description:  Number of element types not specified.
 Action:       Correct input data file and re-run HYPLAS. The number of
               element types must be follow keyword ELEMENT_TYPES.

ED0056   3
 Description:  The specified number of element types is less than 1. 
 Action:       Correct input data file (at least 1 element type must be
               defined) and re-run HYPLAS.

ED0057   6
 Description:  The specified number of element types exceeds the
               specified total number of element groups.
 Action:       Correct input data file (the number of element types
               must be greater than 0 and less than or equal the
               specified total number of element groups) and re-run
               HYPLAS.

ED0058   5
 Description:  Blank line in element types specification section.
 Action:       Correct input data file and re-run HYPLAS. Blank lines
               are not allowed in element types specification section,
               which starts in the line immediately after keyword
               ELEMENT_TYPES.

ED0059   4
 Description:  Element type not correctly specified.
 Action:       Correct the input data file and re-run HYPLAS. An element
               type number followed by a valid element type name was
               expected in the last line read.

ED0060   7
 Description:  Invalid specification of element type identification
               number.
 Action:       Correct the input data file and re-run HYPLAS. Element
               type identification numbers (defined in the ELEMENT_TYPES
               specification section) must be greater than 0 and less
               than or equal the specified total number of element
               types.

ED0061   6
 Description:  Repeated specification of element type identification
               number.
 Action:       Correct the input data file and re-run HYPLAS. Each
               element type identification number (defined in the
               element types specification section) must be specified
               only once.

ED0062   7
 Description:  Error in element group definition.
 Action:       Correct the input data file and re-run HYPLAS. For any
               element group, the group identification number, the
               element type identification number and the material
               type identification number must all be greater than 0
               and less than or equal the specified total number of
               element groups.

ED0063   5
 Description:  Repeated specification of element group identification
               number.
 Action:       Correct input data file and re-run HYPLAS. Each element
               group identification number (defined in the element
               groups specification section) must be defined only once.

ED0064   7
 Description:  Element type name not recgonised (possible mispelling).
 Action:       Correct the input data file. The acceptable element type
               names are:
                             TRI_3;
                             QUAD_4;
                             QUAD_8;
                             QUAD_4_FBAR.

ED0065   7
 Description:  The properties associated to an element type
               identication number assigned to an element group have
               not been defined.
 Action:       Correct input data file and re-run HYPLAS. If an element
               type identification number is assigned to an element
               group in section ELEMENT_GROUPS, then the corresponding
               element type must be specified in section ELEMENT_TYPES.

ED0066   7
 Description:  The properties associated to a material type
               identication number assigned to an element group have
               not been defined.
 Action:       Correct input data file and re-run HYPLAS. If a material
               type identification number is assigned to an element
               group in section ELEMENT_GROUPS, then the corresponding
               material type must be specified in section MATERIALS.

ED0067   5
 Description:  Incorrect number of terms in Ogden's strain-energy
               function.
 Action:       Correct input data file and re-run HYPLAS. The number of
               terms in Ogden's strain energy function must be greater
               than or equal to 1.

ED0068   8
 Description:  Thickness has been assigned to an inexistent element
               (with identification number less than or equal to 0 or
               greater than the specified total number of elements) in
               section THICKNESS.
 Action:       Correct input data file and re-run HYPLAS. Element
               numbers must be greater than 0 and less than or equal
               to the specified total number of elements in the
               structure.

ED0069   6
 Description:  Repeated specification of thickness for an element.
 Action:       Delete the repeated element thickness specification or
               correct the element number in section THICKNESS of the
               input data file and re-run HYPLAS. Under the option
               DEFINED_BY_ELEMENT, the thickness of each element must
               be defined only once.

ED0070   7
 Description:  Thickness has been assigned to an inexistent node (with
               identification number less than or equal to 0 or greater
               than the specified total number of nodes) in section
               THICKNESS.
 Action:       Correct input data file and re-run HYPLAS. Node numbers
               must be greater than 0 and less than or equal to the
               specified total number of nodes in the structure.

ED0071   6
 Description:  Repeated specification of thickness for a node.
 Action:       Delete the repeated node thickness specification or
               correct the node number in section THICKNESS of the
               input data file and re-run HYPLAS. Under the option 
               DEFINED_BY_NODE, the thickness of each node must be
               defined only once.

ED0072   9
 Description:  Error in thickness input section. Another keyword,
               specifying the type of initial thickness distribution,
               was expected immediately after keyword THICKNESS.
 Action:       Correct the input data file and re-run HYPLAS. One of
               the following keywords must follow keyword THICKNESS:

                                UNIFORM;
                                DEFINED_BY_ELEMENT;
                                DEFINED_BY_NODE.

ED0073   9
 Description:  Unacceptable keyword (possible mispelling) specifying
               the type of initial thickness distribution in thickness
               input section.
 Action:       Correct the input data file and re-run HYPLAS. The
               acceptable keywords (to appear immediately after keyword
               THICKNESS) are:
                                UNIFORM;
                                DEFINED_BY_ELEMENT;
                                DEFINED_BY_NODE.

ED0075   6
 Description:  Thickness has not been specified for 1 or more elements.
 Action:       Specify the thickness of the missing element(s) in the
               input data file and re-run HYPLAS. Under the option
               DEFINED_BY_ELEMENT in section THICKNESS, the thickness
               (required in plane stress analysis only) must be defined
               for all elements of the mesh.

ED0076   6
 Description:  Thickness has not been specified for 1 or more nodes.
 Action:       Specify the thickness of the missing node(s) in the
               input data file and re-run HYPLAS. Under the option
               DEFINED_BY_NODE in section THICKNESS, the thickness
               (required in plane stress analysis only) must be defined
               for all nodes of the mesh.

ED0077   4
 Description:  A negative Young's modulus has been specified for a
               linear elastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's must be positive.

ED0078   4
 Description:  Incorrect specification of Poison's ratio for linear
               elastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Poisson's must be in the interval (-1,0.5).

ED0079   2
 Description:  Keyword INCREMENTS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0080   2
 Description:  Keyword TITLE not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0081   2
 Description:  Keyword ANALYSIS_TYPE not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0082   2
 Description:  Keyword AXIS_OF_SYMMETRY not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0083   3
 Description:  Keyword LARGE_STRAIN_FORMULATION not found in input data
               file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0084   2
 Description:  Keyword SOLUTION_ALGORITHM not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0085   2
 Description:  Keyword ELEMENT_GROUPS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0086   2
 Description:  Keyword ELEMENT_TYPES not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0087   2
 Description:  Keyword MATERIALS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0088   2
 Description:  Keyword ELEMENTS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0089   2
 Description:  Keyword NODE_COORDINATES not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0090   2
 Description:  Keyword THICKNESS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0091   3
 Description:  Keyword NODES_WITH_PRESCRIBED_DISPLACEMENTS not found in
               input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0092   2
 Description:  Keyword LOADINGS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0093   2
 Description:  Keyword POINT_LOADS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0094   2
 Description:  Keyword GRAVITY_LOAD not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0095   2
 Description:  Keyword EDGE_LOADS not found in input data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0096   6
 Description:  Re-start file not found.
 Action:       Correct the input data file and re-run HYPLAS. Make sure
               the re-start file, whose name is defined immediately
               following keyword RESTART in the input data file, has
               been previously generated by HYPLAS and is in the same
               directory as the input data file.

ED0097   6
 Description:  Maximum allowed number of load increments for arc-length
               incrementation control not specified.
 Action:       Correct input data file and re-run HYPLAS. When
               incrementation by the arc-length method is selected, the
               maximum allowed number of load increments must follow
               keyword INCREMENTS.

ED0098   4
 Description:  Maximum allowed number of load increments for arc-length
               incrementation control is less than or equal to 0.
 Action:       Correct input data file and re-run HYPLAS. The maximum
               allowed number of increments must be greater than 0.

ED0099   5
 Description:  Invalid specification of numerical integration rule for
               element of type QUAD_4_FBAR.
 Action:       Correct the input data file and re-run HYPLAS. Only the
               4 Gauss point integration rule is allowed for this type
               of element.

ED0100   4
 Description:  Invalid specification of Young's modulus for VON_MISES
               type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's modulus must be greater than zero.

ED0101   4
 Description:  Unacceptable number of points on hardening curve for
               VON_MISES type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curve must be defined by at least 2 points.

ED0102   7
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               VON_MISES type elasto-plastic material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               VON_MISES type material, the minimum value of MIPROP
               is 3. 

ED0103   7
 Description:  Number of real properties required by VON_MISES type
               material exceeds the maximum permissible number.
 Action:       If the data file is correct, change the dimensioning
               parameter MRPROP in the file MATERIAL.INC, re-compile
               and re-run HYPLAS. For this material, MRPROP must be
               greater than or equal to  3+2*NHARD, where NHARD is the
               specified number of points on the hardening curve.

ED0104   5
 Description:  Number of real state variables required by VON_MISES
               type material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 5.

ED0105   6
 Description:  Number of logical algorithmic variables required by
               VON_MISES type material exceeds the maximum permissible
               number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 2.

ED0107   4
 Description:  Invalid specification of Young's modulus for TRESCA
               type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's modulus must be greater than zero.

ED0108   4
 Description:  Unacceptable number of points on hardening curve for
               TRESCA type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curve must be defined by at least 2 points.

ED0109   6
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               TRESCA type elasto-plastic material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               TRESCA type material, the minimum value of MIPROP is 3. 

ED0110   7
 Description:  Number of real properties required by TRESCA type
               material exceeds the maximum permissible number.
 Action:       If the data file is correct, change the dimensioning
               parameter MRPROP in the file MATERIAL.INC, re-compile
               and re-run HYPLAS. For this material, MRPROP must be
               greater than or equal to  3+2*NHARD, where NHARD is the
               specified number of points on the hardening curve.

ED0111   5
 Description:  Number of real state variables required by TRESCA
               type material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 5.

ED0112   6
 Description:  Number of logical algorithmic variables required by
               TRESCA type material exceeds the maximum permissible
               number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 4.

ED0113   6
 Description:  Number of real algorithmic variables required by
               TRESCA type material exceeds the maximum permissible
               number.
 Action:       Change the dimensioning parameter MRALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRALGV must be greater than or equal to 2.

ED0114   4
 Description:  Invalid specification of Young's modulus for
               DRUCKER_PRAGER type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's modulus must be greater than zero.

ED0115   5
 Description:  Invalid specification of frictional and/or dilatancy
               angle for DRUCKER_PRAGER type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               frictional and dilatancy angles must be within the
               interval [0,90) degrees.

ED0116  11
 Description:  Invalid flag for selection of Drucker-Prager
               approximation to Mohr-Coulomb criterion.
 Action:       Correct the input data file and re-run HYPLAS. The valid 
               flags are:
                          0 - Matching OUTER edges of M-C surface
                          1 - Matching INNER edges of M-C surface
                          2 - Plane strain match
                          3 - Matching M-C criterion in uniaxial
                              compression and uniaxial tension
                          4 - Matching M-C criterion in biaxial
                              compression and biaxial tension

ED0117   4
 Description:  Unacceptable number of points on hardening curve for
               DRUCKER_PRAGER type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curve must be defined by at least 2 points.

ED0118   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0119   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0120   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0121   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0122   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0123   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0124   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0125   3
 Description:  One or more nodal coordinates have not been defined.
 Action:       Correct NODE_COORDINATES section of input data file and
               re-run HYPLAS.

ED0126   3
 Description:  Repeated node number has been detected.
 Action:       Correct NODE_COORDINATES section of input data file and
               re-run HYPLAS.

ED0127   5
 Description:  Invalid node number in NODE_COORDINATES section.
 Action:       Correct NODE_COORDINATES section of input data file and
               re-run HYPLAS. Node numbers must be greater than 0 and
               less than or equal to the specified total number of
               nodes.

ED0128   0
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0129   6
 Description:  Error in the specification of Master/Slave kinematical
               constraints. A slave node has been assigned to more than
               one master/slave set with its third degree of freedom
               constrained.
 Action:       Correct Master/Slave constraint specification in input
               data file and re-run HYPLAS.

ED0130   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0131   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0132   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0133   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0134   7
 Description:  Point load has been assigned to an inexistent node (with
               identification number less than or equal to 0 or greater
               than the specified total number of nodes) in section
               POINT_LOADS of the data file.
 Action:       Correct the input data file and re-run HYPLAS. Node
               numbers must be greater than 0 and less than or equal to
               the specified total number of nodes in the structure.

ED0135   2
 Description: ???? Unused code - developers may re-use this code
 Action:       

ED0136   5
 Description:  Unacceptable material parameter for Mohr-Coulomb type
               elasto-plastic material model. The specified Young's
               modulus is non-positive. The Young's modulus must be
               strictly positive.
 Action:       Correct your data file and re-run HYPLAS.

ED0137   6
 Description:  Unacceptable material parameter for Mohr-Coulomb type
               elasto-plastic material model. The specified frictional
               angle is outside the acceptable interval.
               The frictional angle must be within the interval [0,90)
               degrees.
 Action:       Correct your data file and re-run HYPLAS.

ED0138   4
 Description:  Unacceptable number of points on hardening curve for
               MOHR_COULOMB type elasto-plastic material model.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curve must be defined by at least 2 points.

ED0139   3
 Description:  Keyword ARC_LENGTH_PREDICTOR_OPTION not found in input
               data file.
 Action:       Correct the input data file and re-run HYPLAS.

ED0140  11
 Description:  Missing option in ARC_LENGTH_PREDICTOR_OPTION section.
 Action:       Correct the input data file and re-run HYPLAS.
               The acceptable predictor options (one of which must
               follow keyword ARC_LENGTH_PREDICTOR_OPTION in the same
               line) are:

                    SECANT_PATH     - Uses secant path predictor
                                      criterion.

                    STIFFNESS_SIGN  - Follows sign of stiffness
                                      determinant.

ED0141  12
 Description:  Unacceptable option in ARC_LENGTH_PREDICTOR_OPTION
               section.
 Action:       Correct the input data file and re-run HYPLAS.
               The acceptable predictor options (one of which must
               follow keyword ARC_LENGTH_PREDICTOR_OPTION in the same
               line) are:

                    SECANT_PATH     - Uses secant path predictor
                                      criterion.

                    STIFFNESS_SIGN  - Follows sign of stiffness
                                      determinant.

ED0142   4
 Description:  Unacceptable convergence tolerance prescribed for the
               global equilibrium iterations.
 Action:       Correct the input data file and re-run HYPLAS. The
               convergence must be greater than zero.

ED0143   4
 Description:  Unacceptable desired number of equilibrium iterations for
               automatic load control with the arc-length method.
 Action:       Correct the input data file and re-run HYPLAS. The
               desired number of iterations must be greater than zero.

ED0144  14
 Description:  Coordinate system type not defined in NODE_COORDINATES
               section of input data file.
 Action:       Correct the input data file and re-run HYPLAS. The
               coordinate system to be used must be specified in the
               input data file immediately after (in the same line) the
               keyword NODE_COORDINATES and the number of nodes as
               follows:

                NODE_COORDINATES <number_of_nodes> <coordinate_system>

               where <coordinate_system> can be one of the following
               strings:
                                CARTESIAN;
                                CYLINDRICAL.

ED0145  14
 Description:  Unacceptable coordinate system type in NODE_COORDINATES
               section of input data file.
 Action:       Correct the input data file and re-run HYPLAS. The
               coordinate system to be used must be specified in the
               input data file immediately after (in the same line) the
               keyword NODE_COORDINATES and the number of nodes as
               follows:

                NODE_COORDINATES <number_of_nodes> <coordinate_system>

               where <coordinate_system> can be one of the following
               strings:
                                CARTESIAN;
                                CYLINDRICAL.

ED0146  6
 Description:  Maximum prescribed number of equilibrium iterations is
               less than 1.
 Action:       Correct the input data file and re-run HYPLAS. The
               maximum number of equilirium iterations prescribed in
               section INCREMENTS of the data file must be greater
               or equal to 1.

ED0147   5
 Description:  Stress state type NTYPE not compatible with selected
               element type QUAD_4_FBAR (F-bar four-noded
               quadrilateral). This element is compatible only with
               plane strain and axisymmetric conditions.
 Action:       Correct the input data file and re-run HYPLAS.

ED0148   4
 Description:  Unacceptable number of points on hardening curve for
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL elasto-plastic model.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curve must be defined by at least 2 points.

ED0149   7
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL elasto-plastic model.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               this material model, the minimum value of MIPROP
               is 3. 

ED0150   8
 Description:  Number of real properties required by 
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL material model exceeds
               the maximum permissible number.
 Action:       If the data file is correct, change the dimensioning
               parameter MRPROP in the file MATERIAL.INC, re-compile
               and re-run HYPLAS. For this material, MRPROP must be
               greater than or equal to  5+2*NHARD, where NHARD is the
               specified number of points on the hardening curve.

ED0151   6
 Description:  Number of real state variables required by
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL material model exceeds
               the maximum permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 5.

ED0152   6
 Description:  Number of real algorithmic variables required by
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL material model exceeds
               the maximum permissible number.
 Action:       Change the dimensioning parameter MRALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRALGV must be greater than or equal to 4.

ED0153   6
 Description:  Number of logical algorithmic variables required by
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL material model exceeds
               the maximum permissible number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 6.

ED0154   4
 Description:  Stress state type not compatible with
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL material model.
 Action:       Correct your data file and re-run HYPLAS. This model
               is valid only under PLANE STRAIN.

ED0155   5
 Description:  LARGE_STRAIN_FORMULATION flag not set to ON conflicts
               with PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL material model.
 Action:       Correct your data file and re-run HYPLAS. This model
               is valid only with LARGE STRAINS and the flag must be
               set to ON.

ED0156   4
 Description:  Stress state not implemented for VON_MISES_MIXED model.
 Action:       Correct your data file and re-run HYPLAS. This model
               is currently implemented only for plane strain and
               axisymmetric states.

ED0157   5
 Description:  Large strain formulation not implemented for
               VON_MISES_MIXED model.
 Action:       Correct your data file and re-run HYPLAS. This model
               is currently implemented only for the infinitesimal
               strain theory.

ED0158   4
 Description:  Invalid specification of Young's modulus for
               VON_MISES_MIXED type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's modulus must be greater than zero.

ED0159   4
 Description:  Unacceptable number of points on hardening curves for
               VON_MISES_MIXED type elasto-plastic material.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curves must be defined by at least 2 points.

ED0160   7
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               VON_MISES_MIXED type elasto-plastic material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               VON_MISES type material, the minimum value of MIPROP
               is 3.

ED0161   7
 Description:  Number of real properties required by VON_MISES_MIXED
               type material exceeds the maximum permissible number.
 Action:       If the data file is correct, change the dimensioning
               parameter MRPROP in file MATERIAL.INC, re-compile
               and re-run HYPLAS. For this material, MRPROP must be
               greater than or equal to  3+4*NHARD, where NHARD is the
               specified number of points on the hardening curve.

ED0162   6
 Description:  Number of real state variables required by
               VON_MISES_MIXED type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 9.

ED0163   6
 Description:  Number of logical algorithmic variables required by
               VON_MISES_MIXED type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 2.

ED0164   4
 Description:  Invalid specification of Young's modulus for
               LEMAITRE_DAMAGE elasto-plastic material model.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's modulus must be greater than zero.

ED0165   4
 Description:  Unacceptable number of points on hardening curve for
               LEMAITRE_DAMAGE elasto-plastic material model.
 Action:       Correct the input data file and re-run HYPLAS. The
               hardening curve must be defined by at least 2 points.

ED0166   7
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               LEMAITRE_DAMAGE type elasto-plastic material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               LEMAITRE_DAMAGE type material, the minimum value of
               MIPROP is 3.

ED0167   7
 Description:  Number of real properties required by LEMAITRE_DAMAGE
               type material exceeds the maximum permissible number.
 Action:       If the data file is correct, change the dimensioning
               parameter MRPROP in the file MATERIAL.INC, re-compile
               and re-run HYPLAS. For this material, MRPROP must be
               greater than or equal to  5+2*NHARD, where NHARD is the
               specified number of points on the hardening curve.

ED0168   6
 Description:  Number of real state variables required by
               LEMAITRE_DAMAGE type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 6.

ED0169   6
 Description:  Number of logical algorithmic variables required by
               LEMAITRE_DAMAGE type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 2.

ED0170   5
 Description:  Invalid specification of damage evolution constant
               (exponent of damage law) for LEMAITRE_DAMAGE
               elasto-plastic material model.
 Action:       Correct the input data file and re-run HYPLAS. This
               material constant must be greater than zero.

ED0171   5
 Description:  Invalid specification of damage evolution constant
               (denominator of damage law) for LEMAITRE_DAMAGE
               elasto-plastic material model.
 Action:       Correct the input data file and re-run HYPLAS. This
               material constant must be greater than zero.

ED0172   5
 Description:  Invalid stress state type for LEMAITRE_DAMAGE elasto-
               plastic material model. This model is currently
               implemented only for PLANE STRAIN and AXISYMMETRIC cases.
 Action:       Correct the input data file and re-run HYPLAS.

ED0173   4
 Description:  Invalid stress state type for DAMAGED_ELASTIC material
               model. This model is currently implemented only for
               PLANE STRAIN and AXISYMMETRIC cases.
 Action:       Correct the input data file and re-run HYPLAS.

ED0174   5
 Description:  Negative Young's modulus specified in the data file for
               DAMAGED_ELASTIC material model.
               PLANE STRAIN and AXISYMMETRIC cases.
 Action:       Correct the input data file and re-run HYPLAS. The
               Young's modulus must be positive.

ED0175   4
 Description:  Incorrect specification of Poison's ratio for
               DAMAGED_ELASTIC material.
 Action:       Correct the input data file and re-run HYPLAS. The
               Poisson's ratio must be in the interval (-1,0.5).

ED0176   5
 Description:  Incorrect specification of DAMAGE parameter for
               DAMAGED_ELASTIC material.
 Action:       Correct the input data file and re-run HYPLAS. The
               constant DAMAGE parameter must be within the interval
               [0,1).

ED0177   6
 Description:  Incorrect specification of CRACK CLOSURE parameter for
               DAMAGED_ELASTIC material.
 Action:       Correct the input data file and re-run HYPLAS. The
               constant CRACK CLOSURE parameter must be within the
               interval [0,1].

ED0178   4
 Description:  Error while reading load incrementation data for fixed
               load increments option. Your data file is likely to
               have missing data and/or data of the wrong type.
 Action:       Correct the input data file and re-run HYPLAS.

ED0179   4
 Description:  Error while reading load incrementation data for Arc-
               Length control option. Your data file is likely to have
               missing data and/or data of the wrong type.
 Action:       Correct the input data file and re-run HYPLAS.

ED0180   7
 Description:  Error in specification of element type. You have
               selected the F-bar 4-noded quadrilateral element under
               SMALL STRAINS assumption. This element is currently
               available only for LARGE STRAINS.
 Action:       Correct the input data file re-run HYPLAS. If your
               analysis is indeed to be carried out under small
               strains assumption, select another element type.

ED0181   5
 Description:  Number of real properties required by ELASTIC type
               material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRPROP must be greater than or equal 4.

ED0182   5
 Description:  Number of real state variables required by ELASTIC
               type material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 4.

ED0183   7
 Description:  Number of real properties required by Mohr-Coulomb type
               material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRPROP must be greater than or equal to
               6+2*NHARD, where NHARD is the specified number of points
               on the hardening curve.

ED0184   5
 Description:  Number of real state variables required by Mohr-Coulomb
               type material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 5.

ED0185   6
 Description:  Number of logical algorithmic variables required by
               Mohr-Coulomb type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 5.

ED0186   6
 Description:  Number of real algorithmic variables required by
               MOHR_COULOMB material model exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MRALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRALGV must be greater than or equal to 2.

ED0187   7
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               MOHR_COULOMB type elasto-plastic material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               MOHR_COULOMB type material, the minimum value of MIPROP
               is 3.

ED0188   7
 Description:  Number of real properties required by DRUCKER_PRAGER
               type material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRPROP must be greater than or equal to
               6+2*NHARD, where NHARD is the specified number of points
               on the hardening curve.

ED0189   7
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               DRUCKER_PRAGER type elasto-plastic material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               DRUCKER_PRAGER type material, the minimum value of
               MIPROP is 3.

ED0190   6
 Description:  Number of real state variables required by
               DRUCKER_PRAGER type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 5.

ED0191   6
 Description:  Number of logical algorithmic variables required by
               DRUCKER_PRAGER type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MLALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MLALGV must be greater than or equal to 3.

ED0192   6
 Description:  Number of real algorithmic variables required by
               DRUCKER_PRAGER material model exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MRALGV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRALGV must be greater than or equal to 3.

ED0193   5
 Description:  Number of real properties required by DAMAGED_ELASTIC
               type material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRPROP must be greater than or equal to 7.

ED0194   6
 Description:  Number of real state variables required by
               DAMAGED_ELASTIC type material exceeds the maximum
               permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 4.

ED0195   6
 Description:  The maximum permissible number of integer material
               properties, MIPROP, does not allow the use of the
               OGDEN type material.
 Action:       Change the dimensioning parameter MIPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For the
               OGDEN type material, the minimum value of MIPROP is 3.

ED0196   7
 Description:  Number of real properties required by OGDEN type
               material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRPROP in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRPROP must be greater than or equal to
               2+NOGTRM*2 where NOGTRM is the specified number of
               terms in the Ogden strain-energy function

ED0197   6
 Description:  Number of real state variables required by OGDEN type
               material exceeds the maximum permissible number.
 Action:       Change the dimensioning parameter MRSTAV in the file
               MATERIAL.INC, re-compile and re-run HYPLAS. For this
               material, MRSTAV must be greater than or equal to 4.

ED0198   4
 Description:  Attempt to use TRESCA type material model under large
               strains and plane stress. The TRESCA model is not yet
               implemented for large strains when under plane stress.
               The requested analisys cannot be carried out.

ED0199   5
 Description:  Invalid specification of numerical integration rule for
               element of type Q4WSD.
 Action:       Correct input data file and re-run HYPLAS. Only 6 gauss
               point integration rules are allowed for this type of
               element.

ED0200   4
 Description:  Attempt to use TRESCA type material model under large
               strains and plane stress. The TRESCA model is not yet
               implemented for large strains when under plane stress.
               The requested analisys cannot be carried out.

ED0200   5
 Description:  Large strain formulation not implemented for
               elements with strong discontinuities.
 Action:       Correct your data file and re-run HYPLAS. This finite 
               elements are currently implemented only for the 
               infinitesimal strain theory.

*-----------------------------------------------------------------------
*-----------------------------------------------------------------------
*                                                                      |
*                                                                      |
*                     INPUT   DATA    WARNINGS                         |
*                                                                      |
*                                                                      |
*-----------------------------------------------------------------------

WD0001   2
 Description:  Repeated nodal coordinates. Identical coordinates have
               been detected in two or more nodes.

*-----------------------------------------------------------------------
*                                                                      |
*                                                                      |
*                         INTERNAL  ERRORS                             |
*                                                                      |
*                                                                      |
*-----------------------------------------------------------------------

EI0001   4
 Description:  Inexistent integration rule for quadrilateral domain
               requested to routine GAUS2D.
 Action:       Check the existence of the integration rule requested
               to GAUS2D before calling this procedure.

EI0002   4
 Description:  Inexistent integration rule for triangular domain
               requested to routine GAUS2D.
 Action:       Check the existence of the integration rule requested
               to GAUS2D before calling this procedure.

EI0003   4
 Description:  Non-recognizable integration domain type in routine
               GAUS2D.
 Action:       Make sure the integration domain type passed into GAUS2D
               is acceptable.

EI0004   3
 Description:  Inexistent integration rule requested to routine GAUS1D.
 Action:       Check the existence of the integration rule requested
               to GAUS1D before calling this procedure.

EI0005   7
 Description:  The element type internal number (IELTYP) passed into
               routine SHPFUN is probably not defined.
 Action:       See file ELEMENTS.INC for valid element type internal
               numbers. If the requested IELTYP corresponds to a newly
               implemented element type, then add the new element type
               internal number to the list of existing ones in file
               ELEMENTS.INC, re-compile and re-run HYPLAS.

EI0006   1
 Description: ???? Unused code - developers may re-use this code

EI0007   1
 Description: ???? Unused code - developers may re-use this code

EI0008   3
 Description:  Requested stress state not compatible with subroutine
               SUVMUN. This routine is compatible only with uniaxial
               stress state.

EI0009   3
 Description:  Requested stress state not compatible with subroutine
               CTVMUN. This routine is compatible only with uniaxial
               stress state.

EI0012   4
 Description:  Stress state type NTYPE not compatible with internal
               force computation routine IFSTD2. This routine accepts
               only plane strain, plane stress and axisymmetric
               conditions.

EI0013   3
 Description:  Stress state type NTYPE not compatible with state update
               routine SUVM (for Von Mises material). This routine
               accepts only plane strain and axisymmetric conditions.

EI0014   1
 Description: ???? Unused code - developers may re-use this code

EI0015   1
 Description: ???? Unused code - developers may re-use this code

EI0016   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUDP (for the DRUCKER_PRAGER elasto-plastic
               model). This routine accepts only plane strain and
               axisymmetric conditions.

EI0017   4
 Description:  Stress state type NTYPE not compatible with consistent
               tangent computation routine CTDP (for the DRUCKER_PRAGER
               elasto-plastic model). This routine accepts only plane
               strain and axisymmetric conditions.

EI0018   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUEL (for the linear elastic material model).
               This routine accepts plane stress, plane strain and
               axisymmetric conditions.

EI0019   4
 Description:  Stress state type NTYPE not compatible with tangent
               modulus computation routine CTEL (for the linear elastic
               material model). This routine accepts plane stress, plane
               strain and axisymmetric conditions.

EI0020   5
 Description:  Stress state type NTYPE not compatible with spatial
               tangent modulus computation routine CSTEP2 (for
               hyperelastic-based elastoplastic material models)
               This routine accepts plane stress, plane strain and
               axisymmetric conditions.

EI0021   4
 Description:  Stress state type NTYPE not compatible with deformation
               gradient computation routine DEFGRA (for isoparametric
               2-D finite elements). This routine accepts plane stress,
               plane strain and axisymmetric conditions.

EI0022   3
 Description:  Stress state type NTYPE not compatible with logarithmic
               strain computation routine LOGSTR. This routine accepts
               plane stress, plane strain and axisymmetric conditions.

EI0023   3
 Description:  Stress state type NTYPE not compatible with infinitesimal
               strain computation routine LISTRA. This routine accepts
               plane stress, plane strain and axisymmetric conditions.

EI0024   3
 Description:  Stress state type NTYPE not compatible with Cauchy-Green
               strain computation routine SETBE. This routine accepts
               plane stress, plane strain and axisymmetric conditions.

EI0025   7
 Description:  Maximum permissible matrix dimension exceeded in routine
               JACOB (Jacobi iterative procedure for spectral
               decomposition of symmetric matrices). The maximum
               dimension is defined by the parameter NMAX in JACOB. If
               the spectral decomposition of a matrix bigger then the
               currently defined size, change NMAX accordingly,
               re-compile and re-run the program.

EI0026   4
 Description:  Stress state type NTYPE not compatible with infinitesimal
               consistent tangent modulus computation routine CTMC (for
               the MOHR_COULOMB elasto-plastic model). This routine
               accepts plane strain and axisymmetric conditions.

EI0027   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUMC (for the MOHR_COULOMB elasto-plastic
               model). This routine accepts only plane strain and
               axisymmetric conditions.

EI0028   4
 Description:  Stress state type NTYPE not compatible with infinitesimal
               consistent tangent modulus computation routine CTTR (for
               the TRESCA elasto-plastic model). This routine accepts
               plane strain and axisymmetric conditions.

EI0029   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUTR (for the TRESCA elasto-plastic
               model). This routine accepts only plane strain and
               axisymmetric conditions.

EI0030   4
 Description:  Stress state type NTYPE not compatible with infinitesimal
               consistent tangent modulus computation routine CTVM (for
               the VON_MISES elasto-plastic model). This routine accepts
               plane strain and axisymmetric conditions only.

EI0031   3
 Description:  Stress state type NTYPE not compatible with state update
               routine SUVMPS (for VON_MISES material). This routine
               accepts only plane stress state (NTYPE=1).

EI0032   4
 Description:  Stress state type NTYPE not compatible with infinitesimal
               consistent tangent modulus computation routine CTVMPS
               (for the plane stress-projected VON_MISES elasto-plastic
               model). This routine accepts plane stress condition only.

EI0033   4
 Description:  Stress state type NTYPE not compatible with internal
               force calculation routine for F-bar elements (IFFBA2).
               This routine accepts only plane strain and axisymmetric
               states.

EI0034   4
 Description:  Stress state type NTYPE not compatible with tangent
               stiffness calculation routine for F-bar elements
               (STFBA2). This routine accepts only plane strain and
               axisymmetric states.

EI0035   4
 Description:  Stress state type NTYPE not compatible with
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL model. Detected in
               subroutine CSTPDS (spatial tangent computation). This
               model is valid only under plane strain.

EI0036   4
 Description:  Stress state type NTYPE not compatible with
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL model. Detected in
               subroutine SUPDSC (state update procedure for this
               model). This model is valid only under plane strain.

EI0037   4
 Description:  Stress state type NTYPE not compatible with
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL model. Detected in
               subroutine ORPDSC (output results for this
               model). This model is valid only under plane strain.

EI0038   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUDPPN (for the DRUCKER_PRAGER elasto-plastic
               model in plane stress). This routine accepts only plane
               stress condition (NTYPE=1).

EI0039   4
 Description:  Stress state type NTYPE not compatible with consistent
               tangent computation routine CTDPPN (for the
               DRUCKER_PRAGER elasto-plastic model in plane stress).
               This routine accepts only plane stress condition.

EI0040   3
 Description:  Stress state type NTYPE not compatible with routine
               MATISU (material interface for state update routine
               calls).

EI0041   3
 Description:  Material class identifier not recognised in routine
               MATISU (material interface for state update routine
               calls).

EI0042   3
 Description:  Material type identifier not recognised in routine
               MATISU (material interface for state update routine
               calls).

EI0043   3
 Description:  Material class identifier not recognised in routine
               MATICT (material interface for consistent tangent
               computation calls).

EI0044   3
 Description:  Material type identifier not recognised in routine
               MATICT (material interface for consistent tangent
               computation calls).

EI0045   3
 Description:  Material type identifier not recognised in routine
               MATIOR (material interface for output result routine
               calls).

EI0046   3
 Description:  Material type identifier not recognised in routine
               MATISW (material interface for initialising/switching
               routine calls).
EI0047   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUVMMX (for Von Mises material with mixed
               hardening). This routine accepts only plane strain and
               axisymmetric conditions.

EI0048   5
 Description:  Stress state type NTYPE not compatible with infinitesimal
               consistent tangent modulus computation routine CTVMMX
               (for the von Mises elasto-plastic model with mixed
               hardening). This routine accepts plane strain and
               axisymmetric conditions only.

EI0049   5
 Description:  Large strain flag NLARGE not compatible with switching/
               initialising routine SWVMMX (for the von Mises elasto-
               plastic model with mixed hardening).
               This routine has been coded only for the small strain
               case.

EI0050   3
 Description:  Stress state flag not compatible with VON_MISES_MIXED
               model implementation. This model is currently implemented
               only for plane strain and axisymmetric states.

EI0051   4
 Description:  Stress state type flag NTYPE not compatible with state
               update routine SUDAMA (for LEMAITRE_DAMAGE material).
               This routine accepts only plane strain and axisymmetric
               conditions.

EI0052   5
 Description:  Stress state type flag NTYPE not compatible with
               infinitesimal consistent tangent modulus computation
               routine CTDAMA (for LEMAITRE_DAMAGE elasto-plastic
               model). This routine accepts plane strain and
               axisymmetric conditions only.

EI0053   5
 Description:  Singular derivative in subroutine CTDAMA (infinitesimal
               consistent tangent modulus computation for
               LEMAITRE_DAMAGE elasto-plastic model).
               This should have been detected in routine SUDAMA.
               You have a bug in the program.

EI0054   3
 Description:  Stress state type flag NTYPE not compatible with
               material model implementation detected in subroutine
               SWDMEL. You have a bug in the program.

EI0055   3
 Description:  Stress state type flag NTYPE not compatible with
               material model implementation detected in subroutine
               ORDMEL. You have a bug in the program.

EI0056   3
 Description:  Stress state type flag NTYPE not compatible with
               material model implementation detected in subroutine
               CTDMEL. You have a bug in the program.

EI0057   3
 Description:  Stress state type flag NTYPE not compatible with
               material model implementation detected in subroutine
               SUDMEL. You have a bug in the program.

EI0058   5
 Description:  Material type not recognised or not implemented for
               finite strains under plane stress. Error detected in
               subroutine MATISU when trying to call the procedure
               for thickness update for a material of class HYPEPL
               under finite strains and plane stress.

EI0059   6
 Description:  Material type not recognised or not implemented for
               finite strains under plane stress. Error detected in
               subroutine MATICT when trying to call the procedure
               for computation of the total deformation gradient
               (including the thickness strain) for a material of class
               HYPEPL under finite strains and plane stress.

EI0060   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUTRPN (for the Tresca elasto-plastic model in
               plane stress). This routine accepts only plane stress
               (NTYPE=1).

EI0061   4
 Description:  Stress state type NTYPE not compatible with state update
               routine SUVMTC (for the VON_MISES elasto-plastic
               model in plane stress). This routine accepts only plane
               stress condition (NTYPE=1).

EI0062   4
 Description:  Stress state type NTYPE not compatible with internal
               force computation routine IFSD2. This routine accepts
               only plane strain, plane stress and axisymmetric
               conditions.

EI0063   3
 Description:  Stress state type NTYPE not compatible with infinitesimal
               strain computation routine SDSTRA. This routine accepts
               plane stress, plane strain and axisymmetric conditions.

*-----------------------------------------------------------------------
*                                                                      |
*                                                                      |
*                        EXECUTION  ERRORS                             |
*                                                                      |
*                                                                      |
*-----------------------------------------------------------------------

EE0001   2
 Description:  Inversion of singular deformation gradient requested to
               subroutine INVF2.

EE0002   8
 Description:  Too many sub-increments resulting from consecutive
               increment cuts. Sub-increment stack array in main
               program is full.
 Action:       If more sub-increments are needed the parameter MSUBIN
               must be redefined in file MAXDIM.INC. The maximum
               permissible number of consecutive increment cuts is
               MSUBIN-1.  After editing MAXDIM.INC, re-compile and
               re-run HYPLAS.

EE0003   8
 Description:  Zero or negative jacobian determinant in subroutine
               STSTD2 (Element stiffness calculation for elements of
               class 'STDARD' in 2-D).
 Action:       This error is likely to have been caused by wrong order
               in node numbering of an element. The number of the
               element which caused the error is printed above. If the
               sequence of its node numbers is wrong, correct the
               corresponding data file and re-run HYPLAS.

EE0004   3
 Description:  Non-positive deformation gradient determinant in
               sobroutine STSTD2 (Element stiffness calculation for
               elements of class 'STDARD' in 2-D).

EE0005   3
 Description:  Jacobi iterative spectral decomposition procedure did
               not converge within the maximum allowed number of
               iteration. Spectral decomposition not completed.

EE0006   3
 Description:  Division by zero in subroutine CSTPDS (calculation of the
               consistent tangent matrix for the planar double slip
               single crystal elasto-plastic model).

EE0007   7
 Description:  Zero or negative jacobian determinant in subroutine
               STFBA2 (F-bar element stiffness calculation in 2-D).
 Action:       This error is likely to have been caused by wrong order
               in node numbering of an element. The number of the
               element which caused the error is printed above. If the
               sequence of its node numbers is wrong, correct the
               corresponding data file and re-run HYPLAS.

EE0008   3
 Description:  Non-positive deformation gradient determinant in
               sobroutine STFBA2 (Element stiffness calculation for
               elements of class 'FBAR' in 2-D).

EE0009   4
 Description:  Attempt to use return mapping to apex of MOHR_COULOMB
               model with zero frictional angle. Mohr-Coulomb model with
               zero frictional angle should reduce to Tresca model.
               Return to apex does not make sense in this case.

EE0010   4
 Description:  Attempt to use return mapping to apex of MOHR_COULOMB
               model with zero dilatancy angle. Apex return for the
               present implementation only makes sense if dilatancy is
               greater than zero.

EE0011   4
 Description:  Attempt to use return mapping to apex of DRUCKER_PRAGER
               model with zero frictional angle. Drucker-Prager model
               with zero frictional angle is equivalent to von Mises
               model. Return to apex does not make sense in this case.

EE0010   4
 Description:  Attempt to use return mapping to apex of DRUCKER_PRAGER
               model with zero dilatancy angle. Apex return for the
               present implementation only makes sense if dilatancy is
               greater than zero.

EE0011   2
 Description:  Attempt invert a singular 3x3 matrix in subroutine
               INVMT3.
               
EE0012   8
 Description:  Zero or negative jacobian determinant in subroutine
               stwsd2 (Element stiffness calculation for elements of
               class 'wsdisc' in 2-D).
 Action:       This error is likely to have been caused by wrong order
               in node numbering of an element. The number of the
               element which caused the error is printed above. If the
               sequence of its node numbers is wrong, correct the
               corresponding data file and re-run HYPLAS.
*-----------------------------------------------------------------------
*                                                                      |
*                                                                      |
*                       EXECUTION  WARNINGS                            |
*                                                                      |
*                                                                      |
*-----------------------------------------------------------------------

WE0001   3
 Description:  Return mapping algorithm for TRESCA type elasto-plastic
               material failed probably due to excessively large strain
               increment.

WE0002   3
 Description:  Return mapping algorithm for DRUCKER_PRAGER type
               elasto-plastic material failed probably due to
               excessively large strain increment.

WE0003   3
 Description:  Return mapping algorithm for MOHR_COULOMB type
               elasto-plastic material failed probably due to
               excessively large strain increment.

WE0004   3
 Description:  Return mapping algorithm for VON_MISES type
               elasto-plastic material failed in routine SUVM, probably
               due to excessively large strain increment.
WE0005   1
 Description: ???? Unused code - developers may re-use this code

WE0006   1
 Description: ???? Unused code - developers may re-use this code

WE0007   1
 Description: ???? Unused code - developers may re-use this code

WE0008   2
 Description:  Zero pivot found in solution of linear system in
               subroutine FRONT.

WE0009   3
 Description:  Zero or negative jacobian determinant in subroutine
               IFSTD2 (Calculation of element internal force vector
               for elements of  class 'STDARD' in 2-D)

WE0010   3
 Description:  Non-positive  deformation gradient determinant in
               subroutine IFSTD2 (Calculation of element internal force
               vector for elements of  class 'STDARD' in 2-D)

WE0011   1
 Description: ???? Unused code - developers may re-use this code

WE0012   2
 Description:  Cylindrical arc-length constraint equation has no real
               roots: Iterative displacement cannot be computed.

WE0013   3
 Description:  Return mapping algorithm for VON_MISES type
               elasto-plastic material failed in routine SUVMPS,
               probably due to excessively large strain increment.

WE0014   3
 Description:  Return mapping algorithm for
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL model failed due to
               failure of tensor exponential calculation.

WE0015   3
 Description:  Return mapping algorithm for
               PLANAR_DOUBLE_SLIP_SINGLE_CRYSTAL model failed to
               converge.

WE0016   3
 Description:  Plane stress enforcement loop for DRUCKER_PRAGER
               elasto-plastic model failed to converge in subroutine
               SUDPPN.

WE0017   3
 Description:  Return mapping algorithm for VON_MISES_MIXED type
               elasto-plastic material failed in routine SUVMMX,
               probably due to excessively large strain increment.

WE0018   3
 Description:  Return mapping algorithm for LEMAITRE_DAMAGE type
               elasto-plastic material failed in routine SUDAMA,
               probably due to excessively large strain increment.

WE0019   3
 Description:  Return mapping algorithm for LEMAITRE_DAMAGE type
               elasto-plastic material has converged to unacceptable
               value of DAMAGE variable in subroutine SUDAMA.

WE0020   4
 Description:  State update algorithm for DAMAGED_ELASTIC type material
               has failed. The Newton-Raphson algorithm to solve the
               piece-wise linear constitutive equation has not
               converged.

WE0021   3
 Description:  Zero or negative jacobian determinant in subroutine
               IFFBA2 (Calculation of element internal force vector
               for elements of  class 'FBAR' in 2-D).

WE0022   4
 Description:  Non-positive incremental deformation gradient determinant
               at element centroid in subroutine IFFBA2 (Calculation of
               element internal force vector for elements of  class
               'FBAR' in 2-D).

WE0023   4
 Description:  Non-positive deformation gradient determinant at element
               centroid in subroutine IFFBA2 (Calculation of element
               internal force vector for elements of  class 'FBAR'
               in 2-D).

WE0024   3
 Description:  Zero or negative jacobian determinant in subroutine
               IFFBA2 (Calculation of element internal force vector
               for elements of  class 'FBAR' in 2-D)

WE0025   4
 Description:  Non-positive  incremental deformation gradient
               determinant in subroutine IFFBA2 (Calculation of element
               internal force vector for elements of  class 'FBAR' in
               2-D).

WE0026   3
 Description:  Plane stress enforcement loop for TRESCA type
               elasto-plastic model failed to converge in subroutine
               SUTRPN.

WE0027   3
 Description:  Zero or negative jacobian determinant in subroutine
               IFSD2 (Calculation of element internal force vector
               for elements of  class 'WSDISC' in 2-D)