Why do I see the error "mpiexec: unable to start all procs; may have invalid machine names" when running a mpich2 job? Below is an example:
[user1@hpc ~]$ mpirun -machinefile /home/user1/machines1 -np 8 /home/user1/cplrun/testmpi mpiexec: unable to start all procs; may have invalid machine names remaining specified hosts: 10.0.0.1 (node-00-10.pcm)
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