On 06/27/2013 09:41 PM, Syed. Jahanzeb Maqbool Hashmi wrote:

MPID_nem_tcp_connpoll(1826): Communication error with rank 0: Connection refused

Sounds like a firewall problem. http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_My_MPI_p... -- Pavan -- Pavan Balaji http://www.mcs.anl.gov/~balaji