Solution : https://service.sap.com/sap/support/notes/133612 (SAP Service marketplace login required)
Key words : 
form handle_error_ext        tables           idoc_contrl                   structure edidc           idoc_status                   structure bdidocstat           return_variables              structure bdwfretvar           t_merrdat                     structure merrdat           idoc_tranc                    structure matidoctranc, bus1001      material master bus1001001   article master bus3003      purchasing info kna1         customer master lfa1         vendor master, form write_appl_log tables   idoc_tranc structure matidoctranc                             t_merrdat structure merrdat                             idoc_status structure bdidocstat, call function 'appl_log_init'               exporting                    object              = object_matu                    subobject           = ' '               exceptions                    object_not_found    = 1                    subobject_not_found = 2, function key <inser authorization> select cross-application authorization objects select authority object b_massmain, header für einen application log schreiben wk/40c mass, scr_progs-status_submode                                            dyn_sel-texpr                                            %_rkey                                   changing <sscrfields>-ucomm, perform write_appl_log tables idoc_tranc                                    t_merrdat                                    idoc_status, path ~ftp/general/r3server/abap/note, additional key words mass change tool downgrade
Related Notes : 
       
| 496484 | MM17:Change/New creation MLGN -> incorrect loading equipment | 
| 495348 | New creatn: M&107 No Data correspond to the selectn condtns | 
| 494672 | Create new segments: Cancel does not work | 
| 123972 | @8R@ Not or only partly compatible with IS-Oil |