Hi all, I am sending this here and not to the bugs list under the assumption that I am doing something wrong... I am trying to use the BNF converter tool. When I try it on simple examples, the first step (generation of the .y and .x files) goes through. When I run happy on the generated .y file, I get the following error: happy.bin: internal error: stg_ap_pp_ret Please report this as a bug to glasgow-haskell-bugs@haskell.org, or http://www.sourceforge.net/projects/ghc/ Any help/guidance would be very appreciated. Thanks Robin.