Hello! I'm trying to compile wxFruit sample program paddleball (http://zoo.cs.yale.edu/classes/cs490/03-04b/bartholomew.robinson/). When I try to compile file paddle.hs (see below where it is availeble) using the call <call> ghc -fglasgow-exts -farrows -package wx -iC:\dapWork\haskell-learning\afrp-0.4 \src:C:\dapWork\haskell-learning paddle.hs </call> I'm getting the error message <error-message> paddle.hs:10: Failed to load interface for `WXFruit': Could not find interface file for `WXFruit' (use -v to see a list of the files searched for) paddle.hs:11: Failed to load interface for `AFRP': Could not find interface file for `AFRP' (use -v to see a list of the files searched for) paddle.hs:12: Failed to load interface for `AFRPUtilities': Could not find interface file for `AFRPUtilities' (use -v to see a list of the files searched for) </error-message> The file WXFruit.hs is located in the same directory as paddle.hs. AFRP.hs and AFRPUtilities.hs are located in the directory C:\dapWork\haskell-learning\afrp- 0.4\src. Apparently, those packages are not installed properly. What should I do in order to compile paddle.hs? Thanks in advance PS: All files related to this example (paddle.hs and wxFruit.hs) are available at http://dapissarenko.com/resources/2005_01_20_haskell_learning/wxFruitSample.... in a 7 MB zip archive. -- Dmitri Pissarenko Software Engineer http://dapissarenko.com