I'm forwarding this mail, in case anyone might know about the bug. ---------- Forwarded message ---------- From: Hugo Pacheco <hpacheco@gmail.com> Date: Jul 18, 2007 3:45 AM Subject: Happy Error To: simonmar@microsoft.com Hi Simon, I'm having what I supose ti be a oarsec internal error when trying to compile some grammar. I get: $ happy -g -a -c Parser.y happy: parE Is this a known bug? I could find no reference to it. I'm using happy version 1.16 and I can't reduce the problem to a single production. The grammar file is attached. Thanks in advance, hugo