I have successfully inserted a Sheet List Table on one on my drawing sheets (Table of Contents) under a Sheet Set. This contains 3 columns: my Drawing Sheet Number, my Drawing Sheet Description, and REVISION (which is a custom sheet set drawing property). 

I am not able to "Update Drawing Sheet List Table" without receiving an <> message in the command window.

All my files are saved locally under the same folder and I have verified there are no broken links. 

Help!