Solution : https://service.sap.com/sap/support/notes/983414 (SAP Service marketplace login required)
Key words :
idoctype_read_complete function module returns, sowrteh data element, idoc segment e2pll40, e1pll40 segment type, hrpll40 object, segment_unknown exception, message ea 257, terms we30, we31 reason, fields soe01
Related Notes :
| 974537 | OBJECT_UNKNOWN for external call |