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The format of the command for Intel MPI is

 

mpirun -n <number of processes> -ppn <number of processes per node> converge-intel-<Rocky version>

 

For example, the command to run CONVERGE on a Rocky 8 system on 4 nodes with 4 processing cores per node is

 

mpirun -n 16 -ppn 4 converge-intel-el8

 

In practice, however, a few things should be added to the mpirun command line to make it more practical. To write the output to a file and start the job in the background using a Rocky 9 system, use

 

mpirun -n 16 -ppn 4 converge-intel-el9 < /dev/null > logfile.out &

 

The redirect of the /dev/null is recommended by Intel MPI to avoid some warnings that would otherwise be sent to stdout.