Failed to open a MATLAB engine session on Windows

[wangjie212]

Hello,

When calling MSession(), I get the following error on Windows:
ERROR: MEngineError("Failed to open a MATLAB engine session")
in MSession at MATLAB\cVrxc\src\engine.jl:23.

I'm using Matlab R2019b 64 bits. I can start Matlab normally.
I have set the env variable MATLAB_HOME and runned matlab -regserver in a Command Prompt as Administrator.

Anyone knows how to fix this?

[musm]

which julia version and platform?

[wangjie212]

Julia 1.2.0 Windows10

[ronubi]

Without explicitly calling MSession, can you just do

mat"ver"

to see if Julia will connect to the Matlab engine?

[wangjie212]

Without explicitly calling MSession, can you just do

mat"ver"

to see if Julia will connect to the Matlab engine?

It reports the error:
MEngineError("failed to open MATLAB engine session")

[musm]

very odd.

[jacob-roth]

I had to do the following (which is manually/hardcoded for R2020b)

1. clone my version https://github.com/jacob-roth/MATLAB.jl.git
2. add push!(LOAD_PATH,"C:\\Users\\roth0674\\git\\MATLAB.jl") to AppData/Local/Programs/Julia-1.x.x/etc/julia/startup.jl and open REPL
3. from REPL, set ENV["MATLAB_ROOT"] = "C:\Program Files\MATLAB\R2020b\" (you will have to move it to this location if you dont want to edit my fork)
4. ] add "C:\path\to\cloned\MATLAB.jl"
5. ] build MATLAB
6. using MATLAB