Solution : https://service.sap.com/sap/support/notes/916236 (SAP Service marketplace login required)
Key words : 
-critical'         'background job - critical'         'due list log'         'application log'         'document volume statistics'         ', monitor set 'sap ccms technical expert monitors'- choose 'system /, data collector nodes         'application monitoring'         'background job -, monitored remote system- choose 'collectors_<, 'async destination'         'rfc destination'         'collector status', monitoring -> <sid> -> tab 'data collection protocol, dswp_bpm   lock argument  client               <client>  user, choose 'extras' -> 'activate maintenance function', message 'rfc failure return code, business process monitoring session reports
Related Notes : 
       
| 1057397 | Error in Business Process Monitoring 700_2007_1 (1) | 
| 558643 | Composite SAP note - Errors in Business Process Monitoring |