SAP Message /ISDFPS/MM_OPEN_DOCS055 - Requir. quantity of PO &1 item &2 sched.l. &4 (&3) could not be reset DOCUMENTATION /ISDFPS/MM_OPEN_DOCS055 : Requir. quantity of PO &1 item &2 sched.l. &4 (&3) could not be reset