April 22, 2024 at 7:41 pm
Lito
Ansys Employee

@Vighnesh Natarajan, 

Try using 'mpiexec' with OpenMPI instead of 'mpirun' as show in the example in our KB.
>>Running simulations with MPI on Linux – Ansys Optics 

## using the install path for OpenMPI shown ##
/usr/lib64/openmpi/bin/mpiexec -n 96 /share/apps/lumerical/v222/bin/fdtd-engine-ompi-lcl -t 1 {PROJECT_FILE_PATH}

Have you tried running with the Lumerical bundled MPICH2? Does it have the same issue?  

/share/apps/lumerical/v222/mpich2/nemesis/bin/mpiexec -n 96 /share/apps/lumerical/v222/bin/fdtd-engine-mpich2nem -t 1 {PROJECT_FILE_PATH}

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