okay, thanks to you all :) the method of zamoht works but the one by danpost not? so here is the error message: error: method removeObject cannot be applied to given types; i am a little bit unable so i don´t get her how to post a picture of my library. :D

The problem was that 'getObjects' returns a list of Objects (not Actors) and 'removeObject' can only remove an Actor object. My last line should have been: