Solution : https://service.sap.com/sap/support/notes/875719 (SAP Service marketplace login required)
Key words : 
sapbwnews bw support package 15 netweaver'04 stack 15, symptom rsar 164 - information missing, 10 content            import support package 23, 0b            import support package 29, internal format reason, persistent staging area, 1 content support package 23, 50            import support package 15, 0            import support package 05, 0b support package 29
Related Notes : 
       
| 836440 | SAPBWNews BW Support Package 15 NW'04 Stack 15 RIN | 
| 829625 | SAPBINews NW7.0 BI Support Package 05 | 
| 783253 | SAPBWNews BW 3.1 Content Support Package 23 | 
| 783251 | SAPBWNews BW 3.0B Support Package 29 |