I printed an open PO list including fully received lines so that I could close PO's that for some reason were not closed after being fully received and invoiced.  Most closed with no incident but a few had an amount post to the TMP3 file with the code POKLSE, and one (only one line fully received and invoiced) actually did a negative PO Booked amount (equal to the line item total) in the TMP3 file.   I could not find a way to get a heads up before closing, so now my BS is off by these amounts.
   
Where are these numbers coming from?