It is not a path problem (I assume you tried *directly* from the source folder,not *directly* from the shortcut).Filemon gives the *file* calls only.It has nothing to do with his situation - also it is not accurate at all. You have either corrupted files or the extension is associated with an irrelevant program. There are no execution level parameters for *.chm files. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist