HI In my network i have some 32 bit machines and some 64 bit machines. With --host i successfully call my application: mpirun -np 3 --host aim-plankton -x DISPLAY ./run_gdb.sh ./MPITest : -np 3 --host aim-fanta4 -x DISPLAY ./run_gdb.sh ./MPITest64 (MPITest64 has the same code as MPITest, but was compiled on the 64 bit machine)
But when i use hostfiles: mpirun -np 3 --hostfile hosts32 -x DISPLAY ./run_gdb.sh ./MPITest : -np 3 --hostfile hosts64 -x DISPLAY ./run_gdb.sh ./MPITest64 all 6 processes are started on the 64 bit machine aim-fanta4. hosts32: aim-plankton slots=3 hosts64 aim-fanta4 slots Is this a bug or a feature? ;) Jody
