Incoming Inspection

We are having a slight problem with incoming inspection. We receive
one part from a purchase order into inspection. The inspector than
inspects the part and it passes. We then go into inspection
processing, po receipts to process the part to inventory. We get an
error message that "the quantity of passed and quantity failed must
equal the received quantity". They do match, but we cannot get past
this point. This is sorta random. Any Help Available.