Hi Matt, they are: FORK_READERS_FROM_WRITERS = 0 FORK_PROCESSORS_PER_MACHINE = 1 Also, I've put printfs next to all the fork() calls that I could find, and the only ones I'm seeing before the hang are at the line I mentioned earlier. -- Stephen Skory s at skory.us http://stephenskory.com/ 510.621.3687 (google voice)