Solution : https://service.sap.com/sap/support/notes/1075316 (SAP Service marketplace login required)
Key words :
STXB, STXH, READ_TEXT, Unicode, SAP Office integration
Related Notes :
| 1412625 | Long load times in transactions PB60 and PBWB |
| 1319517 | Unicode Collection Note |
| 1261426 | Texts from non-Unicode are incorrect in Unicode |
| 1109643 | PBWW, PB60 - Problems w/ long texts from non-Unicode systems |