Guru's, I hope someone can help to fix a problem I am having. We have an assembly model which is run by a skeleton part. However we recently sent this file out to get some parts modified however when trying to get the models back I am getting a not in session message in my model tree (see attached). I have the skeleton in session before I bring in the modified part so should all be there. It seams I am missing something as the modified parts are showing as modified in my workspace but the skkeleton isn't.