Hi, Mavis,

What is the date for PO that displays in the program bar at the top of the PO screen?

I haven't been able to recreate this problem so far. Perhaps I need a little more information.

In your PO Company Profile, Interface Options, what is your 'IC item vendor check' setting?

How are you changing the primary vendor? (1) Is it on the PO header tab and, if so, do you have details/items that also use the vendor you changed to? Or, (2) did you leave the header tab alone and make the change on a particular line detail(s) only? If so, on one or all? Or, (3) are you responding to a prompt from PO asking if you wish to update the primary vendor or not?

Also, have you reviewed the edited PO and does everything look fine in it? Is the data integrity clean?