I’m having a problem running OpenMPI under Torque.  It complains like there is a command syntax problem, but the three variations below are all correct, best I can tell using mpirun –help.  The environment in which the command executes, i.e. PATH and LD_LIBRARY_PATH, is correct.  Torque is 2.3.x.  OpenMPI is 1.2.8.  OFED is 1.4.  

Somewhere in the FAQ I had read that you must not give –machinefile under Torque with OpenMPI 1.2.8 and you did not need to give –np.  That’s why I tried variation 3 below without either of these options, but it still fails.

Thanks for any help

/usr/mpi/intel/openmpi-1.2.8/bin/mpirun -np 28 /tmp/43.fwnaeglingio/falconv4_ibm_openmpi -cycles 100 -ri restart.0 -ro /tmp/43.fwnaeglingio/restart.0

--------------------------------------------------------------------------

Failed to find the following executable:

Host:       n8n26

Executable: -p

Cannot continue.

mpirun --prefix /usr/mpi/intel/openmpi-1.2.8 --machinefile /var/spool/torque/aux/45.fwnaeglingio -np 28 --mca btl ^tcp  --mca mpi_leave_pinned 1 --mca mpool_base_use_mem_hooks 1 -x LD_LIBRARY_PATH -x MPI_ENVIRONMENT /tmp/45.fwnaeglingio/falconv4_ibm_openmpi -cycles 100 -ri restart.0 -ro /tmp/45.fwnaeglingio/restart.0

--------------------------------------------------------------------------

Failed to find or execute the following executable:

Host:       n8n27

Executable: --prefix /usr/mpi/intel/openmpi-1.2.8

Cannot continue.

/usr/mpi/intel/openmpi-1.2.8/bin/mpirun -x LD_LIBRARY_PATH -x MPI_ENVIRONMENT=1 /tmp/47.fwnaeglingio/falconv4_ibm_openmpi -cycles 100 -ri restart.0 -ro /tmp/47.fwnaeglingio/restart.0

--------------------------------------------------------------------------

Failed to find the following executable:

Host:       n8n27

Executable: -

Cannot continue.