I have been just trying to run with one initially as a test. I have even tried to run with a "specified" single processor by invoking mpirun -np 1 nwchem s2.nw, but I get
argument 1 = S2.nw
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mpirun has exited due to process rank 0 with PID 31050 on
node dev-amd09 exiting without calling "finalize". This may
have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
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