Uhhm just a question, is it possible a script can get too long for AU3Check? Or what other reasons can break AU3Check? AU3Check works for all scripts I have exept for just one. In that one I can just write random non existing functions or write variables without declaration (& MustDeclarVars on) but AU3Check returns no error (but the script crashes when running ofcourse) Data: AU3Check version: 1.54.22.0. Script length: 701 lines / 25589 characters (but I don't think thats the reason right?