Why do PMODE and other commands requiring Java sometimes fail to start when the -nodisplay startup option is used?

PMODE or other commands requiring Java might fail to start if the -nodisplay option is used on a linux machine. The following error is produced with PMODE:

 >> pmode start lsf 3

 ??? Error using ==> pmode>iVerifyJava at 303

 pmode is not supported because Java is not currently available.

 Error in ==> pmode at 62

     iVerifyJava();

Answer 1

[MathWorks Support Team]

This error is because all Java modules except for the JVM modules are disabled with the -nodisplay option. PMODE requires that the swing Java modules are available.

The modules available are:

jvm - The Java Virtual Machine

The modules which are disabled are:

awt - Abstract Window Toolkit components (GUI components).

desktop - The MATLAB interactive desktop.

swing - Swing components. (lightweight GUI components in the Java Foundation classes)