1918804 - Error: ME887 when using ExtensionIn structure for any of the material management BAPIs - SAP ERP & SAP S/4 HANA

• You are not able to transfer custom fields when using BAPI_PO_CREATE1, BAPI_PO_CHANGE, BAPI_PR_CREATE, BAPI_PR_CHANGE, BAPI_SAG_CREATE, BAPI_SAG_CHANGE, BAPI_CONTRACT_CREATE, BAPI_CONTRACT_CHANGE or IDoc due to the error ME 887 "Error transferring ExtensionIn data for enhancement &".
• This error is also raised when getting Purchase Order(PO) details from Function Module BAPI_PO_GETDETAIL1. For example when creating a Goods Receipt for an Inbound Delivery, the get details FM is called to gather the related PO details. 

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• Materials Management (MM)
• SAP ERP Central Component
• SAP ERP
• SAP enhancement package for SAP ERP
• SAP enhancement package for SAP ERP, version for SAP HANA
• SAP S/4HANA

SAP ERP Central Component all versions ; SAP ERP all versions ; SAP S/4HANA all versions ; SAP enhancement package for SAP ERP all versions ; SAP enhancement package for SAP ERP, version for SAP HANA all versions

ECC, BAPI, BAPI_PO_CREATE1, BAPI_PO_CHANGE, BAPI_PR_CREATE, BAPI_PR_CHANGE, BAPI_SAG_CREATE, BAPI_SAG_CHANGE, BAPI_CONTRACT_CREATE, BAPI_CONTRACT_CHANGE, BACKEND, BACK-END, CI_EKPODB, PO, PR, CONTRACT, SCHEDULE, SCHEDULING AGREEMENT, SRM, DBIF_RSQL_INVALID_REQUEST, EDI, IDOC, E1BPPAREX, CI_EBANDB, CI_EKKODB, CI_COBLDB, PURCHASEORDER, PURCHASEREQUISITION, BUS2012, BUS2013, BUS2014, ME887, ME 887, EXTENSIONIN, CUSTOM FIELD, SAG, SA , KBA , MM-PUR-PO-BAPI , BAPIs - Purchase order , MM-PUR-GF-ES , Enterprise Services in Purchasing , MM-PUR-OA-BAPI , BAPIs - Outline Agreements , MM-PUR-REQ-BAPI , BAPIs - Purchase requisition , MM-PUR-GF-CE , Customer Enhancements , Problem