Solution : https://service.sap.com/sap/support/notes/170335 (SAP Service marketplace login required)
Key words : 
system displays message number 2, additional key words iw22, secreen 'central header' immediately, attached advance corrections, program error, symptom notification 1, notification, notification 2, init_notification, fcode_objk
Related Notes : 
       
| 539179 | IW31 - Several notifications generated for one order |