When running a depletion simulation on 16 threads, I received this error after the 15th calculation.
Did anybody else get this issue?
*** An error occured in MPI_Reduce
*** on communicator MPI_COMM_WORLD
*** MPI_ERR_ARG: invalid argument of some other kind
*** MPI_ERRORS_ARE_FATA:: your MPI job will now abort
On further investigation, it appears I receive this error as the calculation of the active cycles begin, i.e if I run a simulation with 30 inactive cycles, I get this error message right after the calculation for the inactive cycles is completed.
This error was received during a depletion simulation, in the calculation of the tallies of the initial configuration for the depletion in the first time step.
Hi Ben – one thing you’ll need to make sure is that you are using the same MPICH/OpenMPI installation to build both OpenMC and mpi4py. How are you installing your MPI implementation, OpenMC, and mpi4py?
Best,
Paul