1. Did you accidentally go into editting the format instead of the drawing? Don't laugh and/or feel embarassed - I've seen it happen several times.
2. Did you insert entities on the general drawing frame instead of into (associated to) a view, or the other way round?
3. Exit, DON'T FILE, Exit SW, reboot and try again.
Those are the 3 most obvious things that come to mind. Well, except for the obvious thing to do - call your VAR and make use of the support YOU ARE PAYING FOR every year.
Good luck.