Hi Rolf, You have to use in your code txt = Replace(txt, alterString, neuerString) instead of Replace(txt, alterString, neuerString) In http://gambasdoc.org/help/lang/replace?v2 you can see as Replace works: *Result* *= Replace (* *String* *,* *Pattern* *,* *ReplaceString* [ *,* *Comparison* ] *)* Regards, Ricardo