3587309 - Updating the external RFX fields EXT_RFX_NUMBER and EXT_RFX_ITEM in Purchase Orders

You have an Ariba or SRM Purchase Order where the external RFx fields are filled. You are however unable to update the EXT_RFX_NUMBER and EXT_RFX_ITEM fields in the PO: neither ME22n nor the function module BAPI_PO_CHANGE can modify them. 

BAPIs - Purchase order

External RFX, Ariba, SRM, ME22, ME22N, BAPI_PO_CHANGE, EXT_RFX_NUMBER, EXT_RFX_ITEM, POITEMS, EKPO, update issue, SAP enhancement package for SAP ERP, Purchase Order Processing. , KBA , MM-PUR-PO-BAPI , BAPIs - Purchase order , MM-PUR-PO , Purchase Orders , BNS-ARI-CI-BUY , Managed Gateway for Procurement , Problem