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[multiple-prefixes]
The SLURM process starter for Open MPI does not support multiple
different --prefix options to mpirun.  You can specify at most one
unique value for the --prefix option (in any of the application
contexts); it will be applied to all the application contexts of your
parallel job.

Put simply, you must have Open MPI installed in the same location on
all of your SLURM nodes.

Multiple different --prefix options were specified to mpirun.  This is
a fatal error for the SLURM process starter in Open MPI.

The first two prefix values supplied were:
    %s
and %s
#
[no-hosts-in-list]
The SLURM process starter for Open MPI didn't find any hosts in
the map for this application. This can be caused by a lack of
an allocation, or by an error in the Open MPI code. Please check
to ensure you have a SLURM allocation. If you do, then please pass
the error to the Open MPI user's mailing list for assistance.
#
[no-local-slave-support]
A call was made to launch a local slave process, but no support
is available for doing so. Launching a local slave requires support
for either rsh or ssh on the backend nodes where MPI processes
are running.

Please consult with your system administrator about obtaining
such support.
[no-local-support]
The SLURM process starter cannot start processes local to
mpirun when executing under a Cray environment. The problem
is that mpirun is not itself a child of a slurmd daemon. Thus,
any processes mpirun itself starts will inherit incorrect
RDMA credentials.

Your application will be mapped and run (assuming adequate
resources) on the remaining allocated nodes. If adequate
resources are not available, you will need to exit and obtain
a larger allocation.

This situation will be fixed in a future release. Meantime,
you can turn "off" this warning by setting the plm_slurm_warning
MCA param to 0.