On Apr 2, 2007, at 12:53 PM, Prakash Velayutham wrote:

prakash@wins04:~/thesis/CS/Samples>mpirun -np 4 --bynode --hostfile machinefile ./parallel.laplace

[wins01:17699] *** An error occurred in MPI_Comm_spawn
[wins01:17699] *** on communicator MPI_COMM_WORLD
[wins01:17699] *** MPI_ERR_ARG: invalid argument of some other kind
[wins01:17699] *** MPI_ERRORS_ARE_FATAL (goodbye)
mpirun noticed that job rank 1 with PID 25074 on node wins02 exited on signal 15 (Terminated).
2 additional processes aborted (not shown)

This could be one of several issues:

- An outright bad parameter to MPI_COMM_WORLD (e.g., a bogus communicator) - A subtly-bad parameter to MPI_COMM_WORLD (e.g., the parameters all passed the first-order check [e.g., bozo checks for NULL], but then something later in the process determined that it was an invalid value)
- Something else altogether

Can you make a small example that shows this same problem and send it to the list?

--
Jeff Squyres
Cisco Systems

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