Solution : https://service.sap.com/sap/support/notes/1027178 (SAP Service marketplace login required)
Key words :
rsenq_prot lock manager lock hangs, sapbwnews bw support package 20 netweaver'04 stack 20, flat file upload terminates, lock manager reason, 1 bi import support package 01, flat file directly, call transaction snote, sap bw releases 3, additional support packages, 50 import support package 20
Related Notes :
| 986891 | SAPBWNews BW Support Package 20 NetWeaver '04 Stack 20 RIN |
| 914305 | SAPBINews NetWeaver 7.0 BI Support Package 11 |