So the error only happens when there is communication. It may be caused by IB as your guessed before. Could you try to reconfigure MPICH using "./configure --with-device=ch3:nemesis:tcp” and try again? — Huiwei

On Nov 25, 2014, at 11:23 PM, Amin Hassani <[email protected]> wrote:

Yes it works. output:

$ mpirun -hostfile hosts-hydra -np 2 test rank 1 rank 0

Amin Hassani, CIS department at UAB, Birmingham, AL, USA.

On Tue, Nov 25, 2014 at 11:20 PM, Lu, Huiwei <[email protected]> wrote: Could you try to run the following simple code to see if it works?

#include <mpi.h> #include <stdio.h> int main(int argc, char** argv) { int rank, size; MPI_Init(&argc, &argv); MPI_Comm_rank(MPI_COMM_WORLD, &rank); printf("rank %d\n", rank); MPI_Finalize(); return 0; }

— Huiwei

...

On Nov 25, 2014, at 11:11 PM, Amin Hassani <[email protected]> wrote:

No, I checked. Also I always install my MPI's in /nethome/students/ahassani/usr/mpi. I never install them in /nethome/students/ahassani/usr. So MPI files will never get there. Even if put the /usr/mpi/bin in front of /usr/bin, it won't affect anything. There has never been any mpi installed in /usr/bin.

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