I think I might have figured out what caused the problem.
I used the adt structer script and it, if I analyzed it corretly , tells me that there is an object 0 taht is represented by just a dot and not a path. But I havent figrured out yet how to remove it without crashing the whole adt. If I just remove it, al the data shifts and noggit cant load the adt anymore ToT I really never worked with hex e.g. Its pretty nervwrecking after hours of try and error.