CFX fails while running in parallel using MPICH with the following error:
p4_error: semget failed for setnum: 0
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MPI uses semaphores to access shared memory areas and the error message means the CFX failed to get a semaphore. This can happen if an earlier run has crashed and the shared memory segments were not cleared out. You can check the shared memory segments with a unix command 'ipcs'. You can clear the shared memory segments with the unix command 'ipcrm ' More information is available on the online help at: Help->ANSYS: CFX Solver->Modelling->Using the solver in parallel->Message Passing Interface (MPI) for Parallel-> Common Problems or alternatively use the help to search for 'ipcs' We also provide a tool called 'cleanipcs' that does the same thing. This is normally located in the tools subdirectory of the CFX installation directory. |
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