Solution : https://service.sap.com/sap/support/notes/1289004 (SAP Service marketplace login required)
Key words : 
sapbwnews bw support package 29 netweaver'04 stack 29, temporary table 06 /bi0/06 reason, symptom lock escalations occur, 01 bi abap support package 04, sap netweaver bw 7, bw reporting queries, bw processes hang, sap bw releases 3, parallel processes add, lock-wait situations
Related Notes : 
       
| 1270629 | SAPBINews NW7.0 BI ABAP Support Package 21 | 
| 1260072 | SAPBINews NW7.11 BI ABAP SP02 | 
| 1260071 | SAPBINews NW 7.10 BI ABAP Support Package 08 | 
| 1227876 | SAPBINews NW7.01 BI ABAP Support Package 04 |