I would suggest writing a self-contained script that creates the table, inserts a single record, and updates that record. Present that for consideration along with a description or capture of the results of running the script on your machine.But not all the records fail the update...
But you are able to determine which ones do fail, yes? Use one (or more) of those...
Your problem is a mis-understanding of the data being operated on/with. Figure out a way to show us the problem with real data.
David J.
