Solution : https://service.sap.com/sap/support/notes/504880 (SAP Service marketplace login required)
Key words : 
~ftp/specific/isoil/46b/notes/note, ~ftp/specific/isoil/46c/notes/note, describe table xmseg lines sy-tfill, update mseg set          lgort = mseg-lgort, standard page heading line-size 255, 851/852 clear lgortif posting 851/852 movements, lgort <> mseg-lgort, -mine-specific note, / 'mseg update failed', correct mseg-lgort
Related Notes : 
       
| 542507 | IS-OIL / IS-MINE: CRTs 41-43 for SAP_APPL Support Packages | 
| 520503 | IS-OIL / IS-MINE: CRTs 38-40 for SAP_APPL Support Packages | 
| 512081 | IS-OIL / IS-MINE: CRTs 29-30 for SAP_APPL | 
| 499094 | IS-OIL / IS-MINE: CRTs 34-37 for SAP_APPL Support Packages | 
| 491815 | IS-OIL / IS-MINE: CRTs 26-28 for SAP_APPL | 
| 387861 | Order of IS-OIL / IS-MINE 4.6C Notes (SAP_APPL) | 
| 312430 |