Solution : https://service.sap.com/sap/support/notes/1358929 (SAP Service marketplace login required)
Key words :
broken multi-byte characters caused, terms single code page reason, binary search order differs, ensure reliable system behaviour, code page conversion, unexpected side effects, meaningful error message, improper data cutting, -unicode backend works, unicode soa messages
Related Notes :
1319517 | Unicode Collection Note |
838402 | Problems within non-Unicode system landscapes |