mpiexec -np 2 gpaw-python -c "print('hello')"
[hostname:38130] mca: base: component_find: unable to open /share/apps/openmpi-intel/1.8.4/lib/openmpi/mca_coll_hcoll: /lib64/libz.so.1: version `ZLIB_1.2.3.3' not found (required by /share/apps/python/2.7.9/Canopy_64bit/User/lib/libxml2.so.2) (ignored)
[hostname:38129] mca: base: component_find: unable to open /share/apps/openmpi-intel/1.8.4/lib/openmpi/mca_coll_hcoll: /lib64/libz.so.1: version `ZLIB_1.2.3.3' not found (required by /share/apps/python/2.7.9/Canopy_64bit/User/lib/libxml2.so.2) (ignored)
--------------------------------------------------------------------------
WARNING: There are more than one active ports on host 'penzias', but the
default subnet GID prefix was detected on more than one of these
ports.  If these ports are connected to different physical IB
networks, this configuration will fail in Open MPI.  This version of
Open MPI requires that every physically separate IB subnet that is
used between connected MPI processes must have different subnet ID
values.

Please see this FAQ entry for more details:

  http://www.open-mpi.org/faq/?category=openfabrics#ofa-default-subnet-gid

NOTE: You can turn off this warning by setting the MCA parameter
      btl_openib_warn_default_gid_prefix to 0.
--------------------------------------------------------------------------
Could not find platform independent libraries <prefix>
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Traceback (most recent call last):
  File "/share/apps/python/2.7.9/Canopy_64bit/User/lib/python2.7/site-packages/site.py", line 75, in <module>
Traceback (most recent call last):
  File "/share/apps/python/2.7.9/Canopy_64bit/User/lib/python2.7/site-packages/site.py", line 75, in <module>
    __boot()
    __boot()
  File "/share/apps/python/2.7.9/Canopy_64bit/User/lib/python2.7/site-packages/site.py", line 3, in __boot
  File "/share/apps/python/2.7.9/Canopy_64bit/User/lib/python2.7/site-packages/site.py", line 3, in __boot
    import os
ImportError:     import os
No module named osImportError: No module named os

-------------------------------------------------------
Primary job  terminated normally, but 1 process returned
a non-zero exit code.. Per user-direction, the job has been aborted.
-------------------------------------------------------
--------------------------------------------------------------------------
mpiexec detected that one or more processes exited with non-zero status, thus causing
the job to be terminated. The first process to do so was:

  Process name: [[1922,1],0]
  Exit code:    1
--------------------------------------------------------------------------
[hostname:38127] 1 more process has sent help message help-mpi-btl-openib.txt / default subnet prefix
[hostname:38127] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages