With lots of help I think I am getting close to a "hello, world" BGL, MPI example to execute. Not sure about the error I am getting from execution from libs/mpi/example on symmetric multiprocessing (SMP) cluster of compute nodes, 1. compilation/translation of hello_world.cpp, works :-) $ mpiCC -I ../boost_1_48_0 \ -I ../boost_1_48_0/boost/mpi \ -I ../boost_1_48_0/stage/lib \ -lboost_mpi \ -lboost_thread \ -lboost_regex \ -lboost_graph -lboost_graph_parallel \ -lboost_serialization \ -lpthread \ hello_world.cpp -o hello_world 2. execution, error :-( $ mpirun -np 2 ./hello_word *** Process received signal *** Signal: Segmentation fault (11) *** Signal code: Address not mapped (1) *** Failing at address (nil) *** /lib64/libpthread.so.0 *** mpirun noticed process rank 0 with PID 16684 Maybe someone has seen this before and knows of a fix. Thank you. Andrew M. Neiderer US Army Research Lab