Solution : https://service.sap.com/sap/support/notes/608534 (SAP Service marketplace login required)
Key words : 
terms bw web application, 1c            import support package 6, 0b            import support package 12, exact error messages, 1c support package 06, sap gui session, execute program rszw_webobjects_30_upgrade, 0b support package 12, sapgui session terminates, bw support packages
Related Notes : 
       
| 597258 | Conversion terminates (PARSE_TEMPLATE)/Web template empty | 
| 539827 | SAPBWNews BW 3.1 Content Support Package 06 | 
| 523249 | SAPBWNews BW 3.0B Support Package 12 |