“No X11 DISPLAY variable” – what does it mean?

If you’re on the main display, then or if you’re using csh or tcsh before running your app. Actually, I’m surprised it isn’t set automatically. Are you trying to start this application from a non-graphic terminal? If not, have you modified the default .profile, .login, .bashrc or .cshrc? Note that setting the DISPLAY to :0.0 … Read more