Topic Title

I've made many print files (referencing in several drawings to create a file for printing) before without any problems. Now I am having difficulty with nested x refs not showing up. All layers are on, nothing is locked, and nothing is orphaned. The nest xref is clipped, however, some files show up fine and some don't. I use to not have any problem doing this. It works in some cases but not in others and I can't make any sense of it. Any help would be appreciated.