Jeff, It does launch two mpirun processes (when hung from another terminal window)
scottsayres 95083 99.0 0.0 408918416 1472 s002 R 8:20AM 0:04.48 mpirun -np 4 foo.sh scottsayres 95085 0.0 0.0 408628368 1632 s006 S+ 8:20AM 0:00.00 egrep mpirun|foo.sh scottsayres 95082 0.0 0.1 408918416 10384 s002 S+ 8:20AM 0:00.03 mpirun -np 4 foo.sh I'm looking up how to get the backtrace from them both.... but if you know the answer I could use advice. best Scott
