Dan, here are the answers; > What operating system are you running? What version? I'm running Solaris 10 Sun Microsystems Inc. SunOS 5.10 Generic January 2005 > What version of Flex do you have, 2.5.33, got it from sunfreeware.com > e.g. what does flex --version output? $ flex --version flex 2.5.33 Make any sense? Ed