Hi Gordon, did you already check the firewall settings? Regards, Ursula Von: Gordon Reid [mailto:[email protected]] Gesendet: Donnerstag, 25. Juni 2015 15:46 An: [email protected] Betreff: [mpich-discuss] MPI_Allreduce over multiple machines Hello, I was wondering if somebody would give me assistance on a question I have regarding MPI_Allreduce. Details are on stackoverflow for brevity: http://stackoverflow.com/questions/30955796/mpi-allreduce-error-on-mpich-3-1... Thanks in advance, Gordon _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss