We have returned items we posted as negative quantities under PO-C.  When trying to post the vendor credit memo, not all receipts are showing up in AP-C even though the purchase order receipt report PO-O-E shows the receipts.  How can I post the credit memo.

I did do "view all" and the receivers are there.  However when we enter the negative invoice amount and try to post the invoice, we cannot access those receivers.  I think the problem is - the items we sent back are recounted by our vendor and then they send credit memo with corrected quantities.  There is always a 3-4 piece discrepancy (plus or minus).  The receiver is reopened and the differences are added to the receiver.  It is the added "correction" that never shows up.  Do you think this is what is causing the problem?