diff --git a/BrainPortal/cbrain_plugins/cbrain-plugins-base/cbrain_task/boutiques_task/views/_form_js.html.erb b/BrainPortal/cbrain_plugins/cbrain-plugins-base/cbrain_task/boutiques_task/views/_form_js.html.erb
index 268cc5b10..f8adacca5 100644
--- a/BrainPortal/cbrain_plugins/cbrain-plugins-base/cbrain_task/boutiques_task/views/_form_js.html.erb
+++ b/BrainPortal/cbrain_plugins/cbrain-plugins-base/cbrain_task/boutiques_task/views/_form_js.html.erb
@@ -35,7 +35,7 @@
     cbcsvs       = interface_files.where(:type => 'CbrainFileList').to_a
     cbcsvToFiles = cbcsvs.map do |f|                       # Only used for preview button
       f.sync_to_cache # silly and blocking
-      ids = f.ordered_raw_ids.reject { |i| i.blank? || i == 0 }
+      ids = f.ordered_raw_ids.reject { |i| i.blank? || i == 0 } rescue []
       names = Userfile.find_all_accessible_by_user(@task.user, :access_requested => :read).where( 'userfiles.id' => ids).pluck(:name)
       [ f.name, names ]
     end.to_h
diff --git a/BrainPortal/cbrain_plugins/cbrain-plugins-base/userfiles/cbrain_file_list/views/_cb_file_list.html.erb b/BrainPortal/cbrain_plugins/cbrain-plugins-base/userfiles/cbrain_file_list/views/_cb_file_list.html.erb
index cdfa2695b..b06b29be0 100644
--- a/BrainPortal/cbrain_plugins/cbrain-plugins-base/userfiles/cbrain_file_list/views/_cb_file_list.html.erb
+++ b/BrainPortal/cbrain_plugins/cbrain-plugins-base/userfiles/cbrain_file_list/views/_cb_file_list.html.erb
@@ -22,7 +22,18 @@
 #
 -%>
 
-<% if @userfile.is_locally_synced? %>
+<%
+   csv_array = @userfile.cached_csv_array rescue nil
+%>
+
+<% if csv_array.nil? %>
+    
+    <br>
+    <div class="errorExplanation">
+      Invalid CBRAIN File list, possibly not even CSV. Please verify <em> the file type</em>. No files found. <em>
+    </div>
+
+<% elsif @userfile.is_locally_synced? %>
 
     <p class="medium_paragraphs">
     This type of file contains a list of other CBRAIN files that can be used as input
@@ -38,8 +49,9 @@
     can be missing or wrong).
     </p>
 
+
     <%
-      csv_array     = @userfile.cached_csv_array
+      csv_array   ||= []
       per_page      = 500
       nb_row        = csv_array.size
       page          = (params[:page] || 1).to_i