I have a database which has worked well for a long time. Suddenly the Navigation Pane is empty of tables, queries, etc. The Pane is there. I can open and close it. I can change settings on "Options". Far as I know I have not filtered out everything. I have done a repair compact. The same thing happens whether opening in Access 2010 or 2013. The small app that I have built works ok (access local and remote tables on a MySQL server).
I just need to get all the objects showing to do some adhoc stuff. But the contents have disappeared.