If Gempak programs hang, you can run a cleanup process that is supposed to remove them.

1> Make sure you source the Gemenviron/Gemenviron.profile file first.

2> Type in: $NAWIPS/bin/cleanup -c

It should give you a couple of status messages if it works. i.e.
Checking for and removing IPC message queues . . .
Checking for and removing IPC semaphores . . .