Solution : https://service.sap.com/sap/support/notes/1487734 (SAP Service marketplace login required)
Summary : 
      The SAP Note addresses a problem in SAP NetWeaver BW where a short dump, OBJECTS_OBJREF_NOT_ASSIGNED, is triggered during the navigation in Data Transfer Process (DTP) for direct DataSource access without using a Persistent Staging Area (PSA). This issue is caused by a program error. The resolution involves importing the respective Support Packages for different versions of SAP NetWeaver BW as outlined: SAPKW70025 for BW 7.00, SAPKW70108 for BW 7.01, SAPKW70205 for BW 7.02, and SAPKW71105 for BW 7.11, corresponding to the details provided in respective SAP Notes. Preliminary versions of these notes might be released before the full Support Packages.
Key words : 
short dump objects_objref_not_assigned occurs, solution sap netweaver bw 7, sap netweaver bw 7, sap nw bw 7, data transfer process, persistent staging area, sapbinews nw bi 7, 01 bw abap sp08, 00import support package 25, import support package 08
Related Notes : 
       
| 1471463 | SAPBWNews NW BW 7.01 ABAP SP08 | 
| 1468668 | SAPBWNews NW7.0 BW ABAP Support Package 25 | 
| 1450990 | SAPBWNews NW BW 7.02 ABAP SP05 | 
| 1392433 | SAPBINews NW7.11 BW ABAP Support Package 05 |