I developed some code in Hugs, but now am moving to GHC. I had used Hugs because I wanted to use the Trex module (extensible records), but this has not been as important as I had thought it would be. My modules run fine in Hugs, but I get an error message when I try to run my module in GHC. The message is: parse error on input `PropList' Otherwise the imported modules are interpreted. In the module, the type declarations are: type PropList = [String] type World = Int type Time = Int type SOA = Rec (properties :: PropList, time :: Time, world :: World) type DBSoas = [SOA] The error occurs just after PropList. Is there some basic difference between Hugs and GHC that I'm missing? Where can I get more information about Hugs GHC differences? Cheers, Adam