Hi Haskell Cafe, Anyone know about this error? Installing library in /Users/johnky/Library/Haskell/ghc-7.6.3/lib/reflection-1.4/lib Registering reflection-1.4... Installed reflection-1.4 Configuring mtl-2.0.1.0... Building mtl-2.0.1.0... Preprocessing library mtl-2.0.1.0... [ 1 of 21] Compiling Control.Monad.Writer.Class ( Control/Monad/Writer/Class.hs, dist/build/Control/Monad/Writer/Class.o ) [ 2 of 21] Compiling Control.Monad.State.Class ( Control/Monad/State/Class.hs, dist/build/Control/Monad/State/Class.o ) [ 3 of 21] Compiling Control.Monad.Reader.Class ( Control/Monad/Reader/Class.hs, dist/build/Control/Monad/Reader/Class.o ) [ 4 of 21] Compiling Control.Monad.RWS.Class ( Control/Monad/RWS/Class.hs, dist/build/Control/Monad/RWS/Class.o ) [ 5 of 21] Compiling Control.Monad.Identity ( Control/Monad/Identity.hs, dist/build/Control/Monad/Identity.o ) [ 6 of 21] Compiling Control.Monad.Error.Class ( Control/Monad/Error/Class.hs, dist/build/Control/Monad/Error/Class.o ) Control/Monad/Error/Class.hs:93:18: Not in scope: `catch' Failed to install mtl-2.0.1.0 Cheers, -John -- http://www.gocatch.com/ Sydney, Australia https://www.facebook.com/goCatch https://twitter.com/gocatchapp http://www.linkedin.com/company/goCatch https://itunes.apple.com/au/app/gocatch/id444439909?mt=8 https://play.google.com/store/apps/details?id=com.gocatchapp.goCatch&hl=en http://www.windowsphone.com/en-au/store/app/gocatch/d76b0eb5-bad6-429f-b99e-... http://appworld.blackberry.com/webstore/content/31917887/