PD4ML v4 Forums PD4ML v3 Archived Forums (Read Only) Troubleshooting Gtk-WARNING: cannot open display: Re: Re: Gtk-WARNING: cannot open display:

#27345

Obviously you run PD4ML on Linux or UNIX platform.

In the case make sure that -Djava.awt.headless=true JVM command-line parameter is set. The “headless” mode prevents Java from attempts to connect/use “display resources”. It is important for server environments: as a rule they do not assume any connected display hardware.