I AM LOOKING FOR HELP REMOVE OLD PO'S, HOWEVER I DON'T SEEM TO BE ABLE TO CANCEL SOME OF THE LINE ITEMS. iN PARTICULAR WHEN i TRY TO EITHER CANCEL (YOU CAN'T CANCEL A LINE THAT HAS BEEN RECEIVED AGAINST) OR CANCEL QUANTITY ORDERED (QUANTITY CANCELLED MUST BE LESS THAN REMAINING QUANTITY) ARE THE ERROE MESSAGES I AM RECEIVING. ANY SUGGESTIONS WOULD BE RECEPTIVELY WELCOMED.