Running SPECFEM2D on multiple processors

SPECFEM
1

Hi all,

I have been trying to run SPECFEM2D on multiple processors. I changed the NPROC parameter in the Par_file to 16. But the xspecfem2D run crashes with the following error. Can someone help me with this?

application called MPI_Abort(MPI_COMM_WORLD, 30) - process 0
[unset]: write_line error; fd=-1 buf=:cmd=abort exitcode=30
:
system msg for write_line failure : Bad file descriptor

Error: number of processors supposed to run on: 16
Error: number of MPI processors actually run on: 1

wrong number of MPI processes, must always have NPROC == nproc_read_from_database
Error detected, aborting MPI… proc 0

2

Hi there,

You should use “mpiexec -n #number_of_processors xmeshfem2D” and “mpiexec -n #number_of_processors xspecfem2D” in your terminal.

If you are running on 16 processors, it is mpiexec -n 16 xmeshfem2D