Hello! I've downloaded wxHaskell, ran the wxhaskell-register.bat file and now try to build a minimal wxHaskell program. For this purpose, I tried to start GHCi using following command ghci -package wx GuiTest.hs GHCi crashed with following error messages: <error-messages> GHC Interactive, version 6.2.2, for Haskell 98. http://www.haskell.org/ghc/ Type :? for help. Loading package base ... linking ... done. Loading package haskell98 ... linking ... done. Loading package lang ... linking ... done. Loading package concurrent ... linking ... done. Loading package QuickCheck ... linking ... done. Loading package readline ... linking ... C:/ghc/ghc-6.2.2/HSreadline.o: unknown symbol `_rl_redisplay_function' ghc.exe: unable to load package `readline' </error-messages> What am I doing wrong? TIA Dmitri Pissarenko PS: Here is the code of the application module Main where import Graphics.UI.WXCore main :: IO () main = run gui gui :: IO () gui = do frame <- frameCreateTopFrame "Hello World" windowShow frame windowRaise frame return () -- Dmitri Pissarenko Software Engineer http://dapissarenko.com