Hi John,

Exactly right!

My base table key field's default value was a "key=key+1" function called when new records are appended.

I thought that when new records were appended to the base table from the updatable view, with zero as the key value, the function could set the new key values in the base table at that point.

Evidently that was too late in the game.

I moved the function into a class, added it to the data entry form, and used it to set the key field value on the form (in the view) BEFORE executing tableupdate() to update the underlying table.

It works great!

Im still not sure why there was a problem being that the underlying table was empty, therefore there was no 'Unique Primary Key' to 'violate'. Anyway...

Thanks for your help. That was just enough to send me in the right direction...

Regards,

Todd