Hi Maybe this is not the best place to post this question, but here a lot of people will see and can direct me to the right place. I'm using Linux Slackware 10.2 and 11.0, GHC 6.2 and wxWidgets 2.6.X, 2.7.x I have already tried all kind of combinations but never worked. I tried: GHC 6.2 , 6.2.2, 6.4, 6.4.1, 6.6 wxWidgets 2.6.x, 2.7.x My best result was GHC 6.2 and wxwidgets 2.6.x. But all programs and samples using wxhaskell results in "segmentation fault" I would like to know how to solve this problem. I have to do my exercise but ... Thanks a lot. -- Leandro Maia