In order to copy a closed PO we have to go to PO-D.  If we copy one it works.  My materials manager tells me that in order to copy another one, she has to enter a new PO in PO-A first.  Exiting PO-D, closing Evo and reopening, nothing else works.  What happens is that the second copied PO steals the line items from the previous one and combines those lines with the current lines being copies.  The previous one winds up with no lines.  This is a consistent problem.  The copy in PO-A seems fine.