Solution : https://service.sap.com/sap/support/notes/1151258 (SAP Service marketplace login required)
Key words :
CL_BCS, BCS_EXAMPLE_7, UNICODE
Related Notes :
| 1319517 | Unicode Collection Note |
| 1151257 | Converting document content |
| 590126 | Sending CSV documents up to Release 4.6 |