Hello NHC people, I've just succesfully built NHC under Cygwin + Windows 2K. Works perfectly! I did this to evaluate the error messages NHC produces. I see that you maintain lines and columns in your messages. That's too bad, because I thought we were the only ones with Helium :-) However, the first program I tried to compile gave no errors, while it should have: -- data A a a = A a main = putStrLn "hello" -- [/cygdrive/c/docs] nhc98 NHCTest.hs [/cygdrive/c/docs] ./a.out hello [/cygdrive/c/docs] ghc NHCTest.hs NHCTest.hs:1: Conflicting definitions for `a' In the data type declaration for `A' [/cygdrive/c/docs] helium NHCTest.hs Compiling NHCTest.hs (1,8), (1,10): Duplicated type variable "a" Compilation failed with 1 error I didn't find this bug in the list of known bugs. Cheers, Arjan