Solution : https://service.sap.com/sap/support/notes/1043310 (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, support package reason, supportpackages stack guide, find aninstallation script 'install, abap type char fixes, installed trex bia instances, check set 'detect_and_repair' trexalertserver, mf download procedure, update procedure, trex type integer
Related Notes : 
       
| 883726 | BIA 7.00: Central Note SAP NetWeaver BI accelerator |