If LSF is your default run-time environment, and if the directory containing LSF executables is not set in your PATH variable, attempting to launch MP Prism will fail. For example,
hpc-450-3 44 =>prism -n 0 & [1] 26614 hpc-450-3 45 =>/opt/SUNWhpc/bin/prism: bsub: not found [1] Exit 1 prism -n 0