Hell, I got it pared down to just:

update customers set CONTACTNAME = ?crsCustomers.CONTACTNAME 
where CustomerID = ?crsCustomers.CustomerID

Besides the BreakOnError will not catch this because the TABLEUPDATE is returning FALSE so I have to use AERROR() to find out what the error was. You want the ClassLib and Form that repros this? All you have to do is run the form, make a change to the ContactName and hit the save button on the form. The error message info from AERROR is output to the screen.

>Hey Mark,
>
>I don't see anything wrong. Have you tried setting CA.BreakOnError to .t. and then paring down the statement, clause by clause until it stops breaking?