"Out of curiosity, WHY do you want to know where the UDE is placed?"
I think the original poster was attempting to make sure there weren't any UDE hidden he was not aware of. My guess is he may be going through someone else's old files. I've been there. You never know what gremlins are left behind if you didn't start on the project.
Which I just noticed I already posted a few replies ago.
Another option is to re-post the file with the Review Tool turned on - then in the review tool, find the code you are having issues with in the right pane - click on it. The review tool will shapw what event generated that code in the left pane (within scrolling limits) - not the event is listed at the top of the middle pane.
Also note that a UDE may alter other events, depending on how a post is written
Ken Akerboom Sr CAx Systems Engr, Moog, Inc.
Production: NX10.0.3.5 MP16/TC11.2 I'd rather be e-steamed than e-diseaseled