Solution : https://service.sap.com/sap/support/notes/800056 (SAP Service marketplace login required)
Key words : 
sapbwnews bw sp11 netweaver'04 stack 11, introduces missing authorization check, 0b            import support package 26, prerequisites missing functionality, authorization objects s_rs_comp, import support package 20, 50            import support package 11, authorization activity delete, 0b support package 26, 1c support package 20
Related Notes : 
       
| 869553 | Deletion of a multi provider does not delete queries | 
| 856528 | RSZDELETE: No components selected for deletion | 
| 763338 | SAPBWNews BW Support Package 11 NW'04 stack 11 RIN | 
| 723262 | SAPBWNews BW 3.1 SP Content 20 | 
| 723257 | SAPBWNews BW 3.0B Support Package 26 |