Can you think
>of anything else I should check?
>

Just to make sure we're on the same page, let me tell you, step by step, how I handle this (I do what you are trying to do all the time).

I have a form with a grid on it, the grid is based on a view. Besides deletes, no changes can be made to the table from this form. I have an add button and a delete button. The delete button does: (vastly abbreviated)

DELETE
TABLEUPDATE()
REQUERY()

The add button calls a modal add form that uses the same updateable view. The user enters the her information, the record is inserted into the view, and a TABLEUPDATE is performed. The form is closed

Upon returning control to the edit button, a REQUERY is issued and the form refreshed.

Everything should be in a state of happiness now.

Since this is a really common practice for me, it seems that you must be doing something else, or leaving one of these steps out to get this error...

I'm sorry if my efforts at help sound repeated, but this has got me really scratching my head...