i have a network of systems connected over lan with each computer running ubuntu. openmpi 1.4.x is installed on 1 machine and the installation is mounted on other nodes through Networking File System(NFS). the source program and compiled file(a.out) are present in the mounted directory

i run my programs by the following command:

/opt/project/bin/mpirun -np 4 --prefix /opt/project/ --hostfile hostfile a.out

i have not set LD_LIBRARY_PATH but as i use --prefix mpirun works successfully

however as per the open mpi debugging faq: http://www.open-mpi.org/faq/?category=debugging

/opt/project/bin/mpirun -np 4 --prefix /opt/project/ --hostfile hostfile -x DISPLAY=10.0.0.1:0.0 xterm -e gdb a.out

4 xterm windows are opened with gdb running as expected. however when i give the command start to gdb in the windows corresponding to remote nodes, i get the error:

libmpi.so.0 not found: no such file/directory

as mentioned other mpi jobs run fine with mpirun

when i execute

/opt/project/bin/mpirun -np 4 --prefix /opt/project/ -x DISPLAY=10.0.0.1:0.0 xterm -e gdb a.out ,the debugging continues succesfully

please help