Hello everybody, I need to determine the target hosts of an MPI_Comm_spawn by using a file. My solution has been to follow the same procedure of giving a host list, but changing the key: *MPI_Info_set(info, "hostfile", filename)* instead of* MPI_Info_set(info, "hosts", hostlist)* However, MPI_Comm_spawn seems to ignore "hostfile" key and the processes are spawned in the wrong hosts (the hosts set during the first mpiexec). Which key should I use? I'm working over MPICH 3.2 Best regards, -- Sergio Iserte - http://me.sergioiserte.info Research Assistant @ HPC&A Research Group Universitat Jaume I (UJI) *Castellón de la Plana (Spain)* _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss