Solution : https://service.sap.com/sap/support/notes/1044015 (SAP Service marketplace login required)
Key words : 
0 bi            import support package 14, randomly occurring situation, source code enhancement, unrecognized problem occurred, prevent incorrect messages, message class rsd_trex, system automatically checks, automatic index merge, solution sap netweaver 7, newly indexed records
Related Notes : 
       
| 1052146 | BIA 7.00/7.20: Use of merge for delta index by memwatch | 
| 991094 | SAPBINews NetWeaver 7.0 BI Support Package 14 | 
| 883726 | BIA 7.00: Central Note SAP NetWeaver BI accelerator |