Solution : https://service.sap.com/sap/support/notes/1508133 (SAP Service marketplace login required)
Key words :
sap gui user logs, logoff dialog box reason, netweaver business client, sp patch level, dialog box, kernel patch, patch levels, recent patch, system displays, unsaved data
Related Notes :
1055254 | NWBC: Dynpro "Log off" question at end of application |