I've actually developed the same error. No matter what allowances or tests I attempt in my code, I continue to get the Error: You Cancelled the Previous Operation. It occurs every time I execute code. It come up twice in a row and then I get a run time error on the action I tried to run (OnExit, OnClick, etc.).
For instance, I have a login form when you open the app. I HAD code that changed the userID to all caps OnExit but every time that was called, I get the 3 errors. So I removed the action and code. Then when I click on LOGIN I get the same 3 errors OnClick.
I can't seem to get around this. It started to occur when I was testing a new feature deeper in the app so I exited and went back in. I was able to get through the Login and to the same point I left off but then got the error again. So I Compacted & Repaired and now I can't get past the login.
PLEASE HELP!