[OMPI users] Is it not possible to run a program with MPI code without mpirun/mpiexec?

[Naor Movshovitz]

I have open-mpi v1.5.4, installed from the binary installer for
Windows. The following program test.c

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

is compiled and linked without issue with

c:\temp\mpicc test.c

It also runs without issue with

c:\temp\mpirun test.exe

and prints the expected output. However, running the executable directly, as in

c:\temp\test

prints the following and then hangs:

 [COMPUTERNAME:03060] [[34061,0],0] ORTE_ERROR_LOG: Value out of
bounds in file ../../../openmpi-1.5.4\orte\mca\oob\tcp\oob_tcp.c at
line 1193

Is this a bug? I normally expect mpi programs to run without problem
as a standalone executable. I should add that the mpi installation
does not have any directories/files named in the error log, only
pre-built binaries.

Thanks muchly,
-nuun