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p4_error: semget failed for setnum: 0
This means that the maximum number of allowed semaphores on the
master node has been created, and the program you are trying to run
cannot allocate a new semaphore for inter-process communication. This
can happen when somebody has been testing software that does not exit
properly, leaving semaphores and shared memory segments allocated.
If the leftover semaphores are owned by you, it can be fixed by running the following two commands: Run on each machine: /opt/mpich/gnu/sbin/cleanipcs Run on the cluster root: cluster-fork /opt/mpich/gnu/sbin/cleanipcs