How do I get rid of items on RNI (PO-I-F) that are not accurate.  I have items showing up on the report that are not valid, when I try to enter a "dummy" invoice to offset a neg/pos item I get a message:
 
There are no receivers for this vendor before 04/06/04.

If someone has re-opened a closed purchase order via View Purchase Order Receipts, those items now re-appear on the report, but should not.  If you go back and close this purchase order, they will disappear from the report.
 
If a wrong part number or qty was received and a correction processed so that you have 2 transactions that net to $0, you can just enter a dummy invoice for $0, and select both of these offsetting transactions to clear them (I think you have to select the credit transaction first, i.e. negative dollar amount)
 
I balance this report monthly to my open packing lists, so I come across some unusual items frequently.