Okay Egune, I see what I was doing wrong. The first time I compiled it with ifortran and it is when it gave me an error about the mpif.h file, so I added in. I removed the file and recompiled it. It works great now. Thank you. Trent
List-Post: users@lists.open-mpi.org Date: Tue, 26 May 2009 16:54:02 -0700 From: eugene....@sun.com To: us...@open-mpi.org Subject: Re: [OMPI users] MPI_COMM_WORLD Error mtcreekm...@broncs.utpa.edu wrote: I and new to OpenMPI and have looked for this, but not getting anywhere. I got an example program off this site: The compute PI in Fortran example. http://www.mcs.anl.gov/research/projects/mpi/usingmpi/examples/simplempi/main.htm Compiled it with "mpif90" and no errors. Then used the qsub -I and tried both executing directly and "mpirun" and still receive these errors: [MGT-2-1:02994] *** An error occurred in MPI_Comm_rank [MGT-2-1:02994] *** on communicator MPI_COMM_WORLD [MGT-2-1:02994] *** MPI_ERR_COMM: invalid communicator [MGT-2-1:02994] *** MPI_ERRORS_ARE_FATAL (goodbye) Any guidance in the right direction would be appreciated. First, the example works fine for me. You seem to be bombing in MPI_Comm_rank and before it asks you for any input. I guess it's having problems with the MPI_COMM_WORLD communicator being passed to MPI_Comm_rank? Maybe it's having problems finding the mpif.h include file? It's finding *some* mpif.h include file, but presumably not the right one. Make sure the mpif90 and mpirun commands are the ones you think you should be getting and, if they are, try adding -showme to the mpif90 line to see where it's looking for the mpif.h include file.
