Solution : https://service.sap.com/sap/support/notes/79997 (SAP Service marketplace login required)
Key words :
uecha uecha numc 6 vgtyp vbtyp_v char 1 <<<<<insert activate, type length chcktab posnr posnr numc 6 vbup, additional key words vgtyp, vbdpr-vgtyp field, key data elem, extend structure vbdpr, item structure, document category, preceding document, billing item
Related Notes :
| 81687 | Billing document printout - collective note |
| 81681 | Preceding SD doc. category in billing doc. printout |
| 65750 | Invoice print: incorect export data calculation |
| 31206 | Collective billing - Order/Delivery-related |
| 26124 | The field VBRP-VGTYP is not filled |