I just found this discussion:
http://forums.omnigroup.com/showthre...ffort+duration
so, the outcome of this discussion and some testing was: as soon as you had assigned the task to resource you can fix duration and effort. So as a workaround I will now create a default resource and assign all tasks to this resource to fix then duration and effort.
better then nothing, but I would much easier (at least for me and my way of working) if this would be possible directly.
maybe I missed the right way to handle this... any other suggestions?
best regards
thorsten