Hi TC,
I was able to recreate your errors by adding new fields to the search, new columns to the tablegrid etc etc.
Then I started removing objects from the Form, one by one, and then tried (and succeeded) in recreating the error.
When I removed the 'Edit Customer' button (which WAS Button4), everything started working as you'd expect.
But if I re-used Button4 for the Customer Edit, the problem returned.
So I simply added a completely new button (Button7) as the Edit Customer button and didn't encounter any further issues.
I vaguely remember having a similar problem ages ago after I'd made a load of changes to various objects on a form - but to be fair, it's very unusual and MVD is normally rock-solid on things like that.
Just to mention - I changed a few things on your form as part of testing (new search fields, new columns, incremental searches etc) so you'll probably want to change them back. Should have put them back to how they were but I forgot - mea culpa - LOL!
Regards,
Derek.