Solution : https://service.sap.com/sap/support/notes/1469339 (SAP Service marketplace login required)
Summary : 
      In SAP systems employing MDX queries with temporal hierarchy joins, a display issue prevents the "Not Assigned" node leaves from being shown, attributed to a presumed lack of authorization due to a software error. To rectify this, users of various SAP NetWeaver BW versions should import the appropriate Support Packages as outlined (SAP NetWeaver BW 7.00 users should apply Support Package 25, SAPKW70025; BW 7.01 users, Support Package 08, SAPKW70108; BW 7.02 users, Support Package 06, SAPKW70206; BW 7.11 users, Support Package 06, SAPKW71106; BW 7.30 users, Support Package 02, SAPKW73002). Prior to implementing these corrections, reviewing Note 875986 is advised for guidance on using transaction SNOTE. Advance solutions are available as preliminary versions before these packages are officially released.
Key words : 
solution sap netweaver bw 7, sap netweaver bw 7, temporal hierarchy joins, temporal hierarchy join, sap nw bw 7, 30 bw abap sp02, sapbinews nw bi 7, sapbwnews nw bw 7, alleged missing authorization, 11 bw abap sp06
Related Notes : 
       
| 1468668 | SAPBWNews NW7.0 BW ABAP Support Package 25 | 
| 1453841 | SAPBWNews NW7.10 BW ABAP Support Package 11 | 
| 1450990 | SAPBWNews NW BW 7.02 ABAP SP05 | 
| 1392433 | SAPBINews NW7.11 BW ABAP Support Package 05 | 
| 1369294 | SAPBINews NW7.01 BW ABAP Support Package 07 |