Solution : https://service.sap.com/sap/support/notes/103214 (SAP Service marketplace login required)
Key words : 
additional key words votx, internal table xthead, hot package 40b, collective billing processing, sd word processing, prerequisites text determination, sd text determination, text determination, collective delivery, sd documents
Related Notes : 
       
| 191728 | Connection of foreign text editors (Word, etc.) | 
| 118051 | Alternative column width: Call of long text editor | 
| 84661 | Performance SD texts (for collective processing) |