If you create a part by copying from another part that has a notebook declared to it, you must confirm that you would like to declare that notebook to the newly created copied part as well. Otherwise, the system does not copy the notebook declarations to the newly created part.

If you try to create a part from an existing part with external references that are not locally backed up, the system aborts the copy. If you try to create a part from an existing part that has external references that are locally backed up, the system will notify you that those external references will be made permanently independent in the new component, and ask whether you wish to continue.