Solution : https://service.sap.com/sap/support/notes/622139 (SAP Service marketplace login required)
Key words : 
initial aggregate filling terminates withobjects_objref_not_assigned, call method l_r_appl_log->save reason, call method l_r_appl_log->save, 1 content            import support package 7, 0b            import support package 13, terms initial filling, 1 content support package 07, 0b support package 13, bw support packages, support package
Related Notes : 
       
| 539829 | SAPBWNews BW 3.1 Content Support Package 07 | 
| 523278 | SAPBWNews BW 3.0B Support Package 13 |