For some reason I can't find references to these packages Control.Monad.Identity and Sequence. WinHugs barfs on the former
The current release of Hugs doesn't support hierarchial module names. The next release will support them. See http://haskell.org/pipermail/hugs-users/2002-October/000267.html for more details.
and ghc on the later, I'm using
ghc --make -package lang -fglasgow-exts AssocList.hs
I suspect you need -package data but haven't tested this. (btw There were some remarks that Chris's library might be dropped from distributions because no-one is supporting it. I don't recall whether a decision was made on this.) -- Alastair Reid alastair@reid-consulting-uk.ltd.uk Reid Consulting (UK) Limited http://www.reid-consulting-uk.ltd.uk/alastair/