18. Environment

The program reads two environment variables. They are set in the startup script, so the user normally does not have to care about them. In case of problems, the system administrator should look at the startup script and make the necessary modifications.

MOLMOLHOME must be set to the name of the directory where the program was installed.

MOLMOLDEV defines the output device (graphics system). This should be set to Motif/GL when running the program locally on an older SGI machine (e. g. Personal Iris), to Motif/OpenGL when running on newer SGI machines, to Motif/XGL when running the program on a Sun, and to Motif/X11 for other configurations. When running the program on an SGI and displaying remotely on another SGI, you can also use Motif/GL or Motif/OpenGL, but in this case you might get better performance with using Motif/GLD or Motif/OpenGLD. Note that it is much better to run the program locally in most cases. For running the program without graphics, the variable must be set to TTY/NO, which is most conveniently done by giving the -t switch on the command line.

If you want to use a value different from the default for MOLMOLDEV, you can give an alternate value with the -o switch on the command line, or you can set the environment variable before calling the startup script.