Eugene Loh wrote:
It would help if you would include the error messages you encounter.
You need to call MPI_Init(ierr) before you can call (just about) any
other MPI call. E.g., add "call MPI_Init(ierr)" as the first
executable statement of your "program prog".
The error I get with your program is
*** An error occurred in MPI_Comm_f2c
*** before MPI was initialized
*** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
I suppose that message could be clearer.
I filed a request for a "minor enhancement". See
https://svn.open-mpi.org/trac/ompi/ticket/2152
