On Oct 4, 2011, at 10:01 AM, mrivera wrote: > Path: > > Last login: Tue Oct 4 09:37:15 on ttyp2 > Welcome to Darwin! > michael-riveras-computer:~ michaelrivera$ open -e .bash_profile > 2011-10-04 10:01:04.203 open[333] No such file: /Users/michaelrivera/.bash_profile Huh. Is there a .profile file in ~? Try this: ls ~/.profile If not, is there a .bashrc file? ls ~/.bashrc Whichever one you find first, open it with 'open -e'. > michael-riveras-computer:~ michaelrivera$ > > Bison: > > michael-riveras-computer:/usr/local/bin michaelrivera$ /usr/local/bin/bison --version > bison (GNU Bison) 2.4.3 That should be new enough. The code in question was added in 2010. Chip