The following program compiles and runs on GHC 6.6 but fails to compile with the '-hat' option to hmake. The error message is: **Begin Output** hat-trans HatTest.hs Wrote Hat/HatTest.hs ghc-6.6 -c -package hat -o Hat/HatTest.o Hat/HatTest.hs Hat/HatTest.hs:40:50: Ambiguous type variable `a' in the constraint: `Integral a' arising from use of `htakeodds' at Hat/HatTest.hs:40:50-58 Probable fix: add a type signature that fixes these type variable(s) **End Output** The program source is: import Prelude takeodds xs = [ x | x <- xs, (mod x 2) ==0] main = do { print (takeodds [1 ..7]); } Thanks... Deech _________________________________________________________________ Talk now to your Hotmail contacts with Windows Live Messenger. http://clk.atdmt.com/MSN/go/msnnkwme0020000001msn/direct/01/?href=http://get...