Perhaps I wasn't clear in my question.
I AM trying to archive the Purchase Orders. I have tried both RM06EV47 and SARA.
When I try with RM06EV47 I get the error noted in my initial post.
When I try with SARA, the PO is "not found."
I do not have this trouble when trying to archive POs that are associated with production orders. I only have the issue with POs that are associated with maintenance orders.
I was of the impression that a purchase order was a purchase order, I didn't think whether they were associated with a production or maintenance order would impact my ability to archive them.
Thanks,
Andrea