Alert Table error

I built a 3 column table to allow the users, via a SQL query, to view a history of alerts. The table works great, but the first time the table screen is accessed it comes up with an error. The window still opens, and all info is there, but the error pup-up shows. Once it’s cleared that screen can be accessed many times before it will pop-up again. See the attached error report.
alarm screen error.txt (5.68 KB)

One of the bindings is getting a null value causing the error. If you post the window we can see what is going on.