Hi, After running interpreted programs, i want to create an exe file; in a first time, just for my local machine. Later shall i try to install on other machines ... To do this, i wrote a batch file : d: cd d:\prog\lang\haskell set shs=%1 ghc %shs% -o%shs:hs=exe% del %shs:hs=hi% del %shs:hs=o% pause where %1 is my hs file full path. Example of a run : D:\>cd d:\prog\lang\haskell D:\PROG\lang\haskell>set shs=E:\didier\haskell\cases.hs D:\PROG\lang\haskell>ghc E:\didier\haskell\cases.hs -oE:\didier\haskell\cases.exe D:\PROG\lang\haskell>del E:\didier\haskell\cases.hi D:\PROG\lang\haskell>del E:\didier\haskell\cases.o D:\PROG\lang\haskell>pause Appuyez sur une touche pour continuer... It's ok with some modules i have to import, like import Data.List import Data.Maybe But, when using wxhaskell, i get a lot of errors, although i include import Graphics.UI.WXCore import Graphics.UI.WX here is a small list of errors : E:\didier\haskell\graphe.o:fake:(.data+0x2f0): undefined reference to `wxcorezm0zi11zi1zi2_GraphicsziUIziWXCoreziDialogs_infoDialog_closure' E:\didier\haskell\graphe.o:fake:(.data+0x300): undefined reference to `wxzm0zi11zi1zi2_GraphicsziUIziWXziDraw_zdf4_closure' E:\didier\haskell\graphe.o:fake:(.data+0x314): undefined reference to `wxzm0zi11zi1zi2_GraphicsziUIziWXziDraw_zdf4_closure' what should the correct ghc command line be, in order to get a successful compilation ? Thanks for help, Didier Running ghc 6.10.4 on Windows XP SP2, with wxhaskell-0.11.1.2