There have been some fixes to this in the mpich-3.1.x series. Did you try the latest mpich-3.1rc2 release? — Pavan On Nov 30, 2013, at 1:54 PM, Gideon Simpson <[email protected]> wrote:

I just noticed this, but when I try to use mpirun with programs on my OS X machine, while logged into a work VPN, the MPI code just hangs. If I disconnect from my VPN, the problem disappears. Is there a simple fix for this?

-gideon

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-- Pavan Balaji http://www.mcs.anl.gov/~balaji