Solution : https://service.sap.com/sap/support/notes/795843 (SAP Service marketplace login required)
Key words : 
p_lnop type rs_bool p_tsx_bandn type tp_tsx_bandn 4, i_lnop  type rs_boolthe notes mentioned, sapbwnews bw sp11 netweaver'04 stack 11, unique key axis eltsid1 eltsid2, tp_tsx_bandn type sorted table, kid       type rrpr01-kid, universal display hierarchy reason, 0b            import support package 26, 10 content            import support package 20, axis     type rrxaxis
Related Notes : 
       
| 997421 | Calculate as 'Supress Result' on hierarchy nodes | 
| 857895 | 'Suppress results' for the display hierarchy | 
| 853058 | Calculate Results/Single Values as ... priority rules | 
| 839439 | Calculate results as ... displays empty cells | 
| 763338 | SAPBWNews BW Support Package 11 NW'04 stack 11 RIN | 
| 723262 | SAPBWNews BW 3.1 SP Content 20 | 
| 723257 | SAPBWNews BW 3.0B Support Package 26 | 
| 717951 | Calculate single values as ... in hierarchy lists |