Solution : https://service.sap.com/sap/support/notes/989305 (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, supportpackages stack guide, date format handling fixed, installed trex bia instances, html download procedure, update procedure, trex bi accelerator, existing trex instance, /exe/doc/trexversion, aninstallation script 'install
Related Notes : 
       
| 991266 | BIA 7.00: Install throws 'failed to create root directory' | 
| 883726 | BIA 7.00: Central Note SAP NetWeaver BI accelerator |