Newsgroups: comp.parallel.mpi
From: "Michael D. Beynon" <beynon@cs.umd.edu>
Subject: LAM/MPI 6.0 question about mpirun
Organization: Computer Science Department, University of Maryland
Date: Sat, 05 Oct 1996 20:23:10 -0400
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <3256FBEC.41C67EA6@cs.umd.edu>

I have been developing an mpi application using LAM/MPI 6.0.
For debugging, I have been not using mpirun to start my job.
Instead, I can open an xterm to each node in my bhost.def file
and then manually run each program on each of the nodes from
the xterm.  There is a special case in LAM that will cause
this job to start as if I had used mpirun N.

Now the question ...

When I now try to use mpirun, it starts to run, and then
fails with the message
	MPI_Recv: invalid rank (rank 2, comm 0)

Is there any real difference when using mpirun?

Mike.
===================================================================
Michael D. Beynon                    Department of Computer Science
A.V. Williams Bldg, University of Maryland, College Park, MD  20742
Email: beynon@cs.umd.edu        WWW: http://www.cs.umd.edu/~beynon/

