Hi lesbently, thanks for your detailed answer. the problem with the scene is: it is an older scene that I wanted to rework - and it contains just one figure, that V3 with the geomCustom-section. I tried to delete this figure to get a clean scene - and Poser crashed. But your other tip helped :) I loaded the same scene into Poser5, added another V3 figure - and it worked fine :) So finally I can continue my work. thanks to all :)