I've downloaded and tested the openmpi-1.7a1r22817 snapshot,
and it works fine for (multiple) spawning more than 128 processes.
That fix will be included in the next release of OpenMPI, right ?
Do you when it will be released ? Or where I can find that info ?
http://www.open-mpi.org/nightly/trunk/I'm not sure this patch will solve your problem, but it is worth a try.