As final attempt i completely removed all BIAB and Realband stuff from my computer, especially checking Doc settings, looking for traces and remainders, since i noticed some faulty folder pointers like a correctly applied address but BIAB still couldn't find all realtracks, even the checked the registry (did not really find anything there) and reinstalled 2010.5 304 from the ground up. It seems to work ! Thanks all for your help ... - F