openmpi/ompi/runtime/help-mpi-runtime.txt

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# This is the US/English general help file for Open MPI.
#
[mpi_init:startup:internal-failure]
It looks like %s failed for some reason; your parallel process is
likely to abort.  There are many reasons that a parallel process can
fail during %s; some of which are due to configuration or environment
problems.  This failure appears to be an internal failure; here's some
additional information (which may only be relevant to an Open MPI
developer):

  %s
  --> Returned "%s" (%d) instead of "Success" (0)
[mpi-param-check-enabled-but-compiled-out]
WARNING: The MCA parameter mpi_param_check has been set to true, but
parameter checking has been compiled out of Open MPI.  The
mpi_param_check value has therefore been ignored.
[mpi_init:startup:paffinity-unavailable]
The MCA parameter "mpi_paffinity_alone" was set to a nonzero value,
but Open MPI was unable to bind MPI_COMM_WORLD rank %s to a processor.

Typical causes for this problem include:

   - A node was oversubscribed (more processes than processors), in
     which case Open MPI will not bind any processes on that node
   - A startup mechanism was used which did not tell Open MPI which
     processors to bind processes to