What does run time error '0' mean?

run time errors are occurs in programming languages, when we do wrong programming then it occurs

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0 error : unable to get gm local node Id! this means that MPICH-GM cannot find a route to the host denoted with rank 0 in the routing table Is GM loaded on all host in your hostfile ? Please run gm_board_info on all of the hosts to which you are spawning mpi processes, and check that they are all in the routing table3 of each host if not all of the hosts are in the routing tables of each host, rerun the mapper. and more information see http://www.myri.com/serve/cache/174.html