I just installed OpenMPI on my Linux Ubuntu 10.04 LTS 64 bit computer. I downloaded the most recent version of OpenMPI and ran the configure and make commands.
I then tried to run a CFD software called FDS using 2 of the 12 available processors (single node) as a test. I split my computational domain into two meshes, as explained in the FDS manual and would like to run each mesh on a separate core. When I run the command mpirun -np 2 fds5_mpi_linux_64 room_fire.fds I get the following error: Process 0 of 0 is running on comp1 Process 0 of 0 is running on comp1 Mesh 1 is assigned to Process 0 Error: MPI_PROCESS greater than total number of processes Why are two instances of the same process run instead of two separate processes? What I expect to see after running the above command is: Process 0 of 1 is running on comp1 Process 1 of 1 is running on comp1 Mesh 1 is assigned to Process 0 Mesh 2 is assigned to Process 1 ... Any idea what is going on? Thanks for the help. Kind Regards, Clark
