You need to have path on c:\wtk22\bin (or else you need full path in many places). SET PATH=c:\wtk22\bin;%PATH% Need to create two directories, normally created by WTK22 or by hand: cd c:\wtk22\apps\[project] mkdir tmpclasses mkdir bin Also, you need to start editing in the project path, not the src path. e.g. cd c:\wtk22\apps\[project] vim src\MyMidlet.java Do not go out of the [project] path. If you need to edit another file, do: :e %/ This will auto expand to the current [editing] directory.