>patth=c:\GANT\bin;c:\windows;c:\windows\system32;c:\windows\system32\Wbem Is it that really or you made a typo, but it should be c:\GNAT\bin Also you should add C:\GtkAda-2.2.0\bin to the path. >gnatmake -Ic:\gtkada-2.2.0/gtkada/include program.adb Might be better to use backslashes everywhere. Manuel