Solution : https://service.sap.com/sap/support/notes/832679 (SAP Service marketplace login required)
Key words :
relevant support package, conversion error reason, idoc receives status, receives status, terms idoc, program error, conversion errors, write idocs, -unicode format, transaction we21
Related Notes :
| 1491018 | IDoc: Report MASS_RSEOUT00 in Unicode systems |