Solution : https://service.sap.com/sap/support/notes/829348 (SAP Service marketplace login required)
Key words : 
terms query multiprovider time stamp cache reason, sapbwnews bw support package 12 netweaver'04 stack 12, optional i_t_partprov import parameter, 10 content            import support package 21, 0b            import support package 27, 50            import support package 12, 1 content support package 21, rro01_s_partprov data type, reference type rro01_t_partprov, 0b support package 27
Related Notes : 
       
| 879290 | Problems with hierarchy selections in MultiProviders | 
| 871440 | No data in a specific case | 
| 865453 | Incorrect data in some queries with multiprovider | 
| 825396 | Performance in reports with many selections | 
| 822302 | OLAP CACHE for remote providers | 
| 763340 | SAPBWNews BW Support Package 12 NetWeaver'04 Stack 12 RIN | 
| 723263 | SAPBWNews BW 3.1 Content Support Package 21 | 
| 723258 | SAPBWNews BW 3.0B Support Package 27 |