I guess you should post this to the MPICH mailing list. Barry > On Apr 7, 2015, at 10:35 AM, Oliver Browne <oliver.browne at upm.es> wrote: > > Hi, > > Does MPICH have an option similar to the below (from open_MPI) > > -stdin|--stdin <arg0> > Specify procs to receive stdin [rank, all, none] > (default: 0, indicating rank 0) > > Thanks, > > Ollie