On Wed, Jun 22, 2011 at 7:25 AM, Jed Brown <jed at 59a2.org> wrote: > Are you using MPICH2 or Open MPI? I think MPICH2 might be setting > SA_NOCLDSTOP which is saving us from the following race condition: I'm using mpich2-1.3.2p1 My screen version (which is hopefully not important) is 4.00.03. John