Hello, I am having issues running mpiexec when I run on more than one node. I am using v 1.4.1 because it is compatible with LAMMPS software I am using. I am running on Windows Server 2012r2 and trying to get MPICH2 to play nice with Window's batch server. I've installed mpich2 on each of the nodes and the head node. 1) *msiexec /i mpich2-1.2.1-win-ia32.msi* *2) mpiexec -register (to register username and password)* *3) smpd -install (to start spmd server on **each of the nodes and the head node)* *4) On the head node, I've used smpd -sethosts hostname1 hostname2 ... to add each of the hosts. I haven't done this on the compute nodes.* When I execute a job through Windows batch system through PowerShell, my job executes but puts all of the executions on the same node. So if for example my nodes are 16 cores, and I ask for 32 cores, 32 separate processes are run on the first node and none on the second, even though Window's scheduler is allocated 2 nodes. It's like mpiexec is ignoring the node list that the smpd hosts is setting. I can use a machinefile with mpiexec and this will allow me to execute on multiple nodes but it doesn't seem to follow the nodes that Windows allocates in their batch server. I should also add that when I try to request more than one node through Window's batch server with -requestednodes "host1 host2" with new-hpcjob, Windows tells me that I can't do this because I have zero cores available. I can ask for only 1 node and up to the maximum number of cores and it is ok with this. Any suggestions? Thank you. Josh _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss