First, I make sure the PO has been invoiced and the invoice is "in the system".
 
If you get the message: "PO 12345 has $3160 worth of goods which have not been invoiced, Do you still wish to close it...?  Answer YES or YES TO ALL.  This gets rid of the PO on the report once you use the date of closing as the ending date.  IE run the report through today's date if you closed today.  This has no impact on GL.  No transactions are made in GL-O.  Therefore, you may have to make an adjusting entry to make your GL account for PO's received not invoiced balance to your new total.  Probably had to make the opposite entry back when the product was invoiced but didn't fall off of the report.
 
The other situation is when you try to close a PO that is on the report but it says the PO is already closed or some such verbage.  Then you have to go to PO-D-view PO Receivers and reopen the PO.  Then go to PO-K and close the PO.  
 
Not sure what causes this report to have problems, I just know it requires some upkeep.

First, I make sure the PO has been invoiced and the invoice is "in the system".
 
If you get the message: "PO 12345 has $3160 worth of goods which have not been invoiced, Do you still wish to close it...?  Answer YES or YES TO ALL.  This gets rid of the PO on the report once you use the date of closing as the ending date.  IE run the report through today's date if you closed today.  This has no impact on GL.  No transactions are made in GL-O.  Therefore, you may have to make an adjusting entry to make your GL account for PO's received not invoiced balance to your new total.  Probably had to make the opposite entry back when the product was invoiced but didn't fall off of the report.
 
The other situation is when you try to close a PO that is on the report but it says the PO is already closed or some such verbage.  Then you have to go to PO-D-view PO Receivers and reopen the PO.  Then go to PO-K and close the PO.  
 
Not sure what causes this report to have problems, I just know it requires some upkeep.

OK! I got it!
Thanks,