Solution : https://service.sap.com/sap/support/notes/1178408 (SAP Service marketplace login required)
Key words : 
/instguides-> sap netweaver 2004s-> release 2004s-> maintenance-> sps <current_sp_number>-> netweaver 2004s support package stack guide - sps<current_sp_number> update procedure 1, support packages stack guide, support package, complex queries massive improvements, bia update checks indexes, existing trex/bia instance, moving backup indexes fix, revision huge memory consumption, mf download procedure, update procedure
Related Notes : 
       
| 1260249 | BWA 7.00/7.20: List of Error Codes | 
| 1237485 | BIA 7.00: Installation of Revision 47 fails | 
| 1232308 | BIA 7.00: Backup blade not used for all indexes | 
| 1225362 | BIA 7.00: Missing partition attributes - bad performance | 
| 1179307 | BIA - Incorrect data after reindexing in rollup | 
| 1101958 | BIA 7.00/TREX 7.10: How to execute landscape overview | 
| 1058533 | TREX/BWA/HANA service connection to customer systems | 
| 992064 | BIA 7.00 + BIA 7.20: BIA system check | 
| 883726 | BIA 7.00: Central Note SAP NetWeaver BI accelerator |