I've been working all day creating my data structures and formats. When I go back to a table I created earlier, I make a change, and then cannot save because it says it can't find some of my user defined formats. These formats have been in there for days, and I've been making new ones in the same study library. I have tried deleting the format and recreating them, but still when I click 'OK', it just blinks at me. I can't exit the system until I save, but it won't let me save. Any suggestions?