Sven Siegmund schrieb: >> Remove External(), leaving only >> >> RegP_Replace ( "o" ; target; "xxx") >> >> as Calculation. > > Yes, that's what was my first try described @21:23 > FM: There are too few parameters inthis function Rereading your post: did you try this with comma as separator? RegP_Replace ( "o", target, "xxx") Jens