I replaced installed Hugs and ghc with the newest versions which I built myself. ghc works but hugs now exits with the message __ __ __ __ ____ ___ _________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-2005 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Bugs: http://hackage.haskell.org/trac/hugs || || Version: September 2006 _________________________________________ Haskell 98 mode: Restart with command line option -98 to enable extensions Hugs.Prelude not found on current path: ".:{Home}/lib/hugs/packages/*:/usr/local/lib/hugs/packages/*" FATAL ERROR: Unable to load prelude implementation Where does hugs normally find the Hugs.Prelude file? Thanks, Dave Feustel