2236404 - Dump OBJECTS_OBJREF_NOT_ASSIGNED in BI_CONT upgrade

You are upgrading BI_CONT support package and gets an error in XPRA Phase:

Access using a 'ZERO' object reference is not possible.

What happened?
Error in the ABAP Application Program
The current ABAP program "CL_RSDSO_DBTABLE_AQ===========CP" had to because it has come across a statement that unfortunately cannot be executed.

Category ABAP Programming Error
Runtime Errors OBJECTS_OBJREF_NOT_ASSIGNED
Except. CX_SY_REF_IS_INITIAL
ABAP Program CL_RSDSO_DBTABLE_AQ===========CP
Application Component BW-WHM-DBA

Access using a 'ZERO' object reference is not possible.

"OBJECTS_OBJREF_NOT_ASSIGNED" CX_SY_REF_IS_INITIAL
"CL_RSDSO_DBTABLE_AQ===========CP" bzw. CL_RSDSO_DBTABLE_AQ===========CM001
"FACTORY"

 1|method FACTORY.
 2|
 3| " determine database management system
 4| DATA: l_dbsys TYPE sydbsys.
 5| IF i_dbsys IS SUPPLIED AND i_dbsys IS NOT INITIAL.
 6|       l_dbsys = i_dbsys.
 7| ELSE.
 8|       l_dbsys = sy-dbsys(3).
 9| ENDIF.
10|
11| " instantiate dbms specific table representation
12| CASE l_dbsys.
13|      WHEN 'HDB'. rr_dbtable = new cl_rsdso_dbtable_aq_hdb(
14|            i_tablename = i_tablename
15|            i_datastore = i_datastore ).
16| ENDCASE.
17|
18| " initilize table
19| rr_dbtable->init( ). <<<----
20|
21|endmethod.

24 METHOD CL_RSDSO_DBTABLE_AQ===========CP CL_RSDSO_DBTABLE_AQ===========CM001 19
     CL_RSDSO_DBTABLE_AQ=>FACTORY
23 METHOD CL_RSDSO_DSOTABLE_AQ==========CP CL_RSDSO_DSOTABLE_AQ==========CM006 12
      CL_RSDSO_DSOTABLE_AQ=>INIT
22 METHOD CL_RSDSO_TBLSRV===============CP CL_RSDSO_TBLSRV===============CM00I 9
      CL_RSDSO_TBLSRV=>SET_LAYOUT_STANDARD
21 METHOD CL_RSO_ADSO===================CP CL_RSO_ADSO===================CM022 27
       CL_RSO_ADSO=>GET_TABLNM
....
1 EVENT RDDEXECU RDDEXECU 177
      START-OF-SELECTION

• SAP NetWeaver 7.4
• BI Content 757 SP06 (or higher) for SAP BW 7.40
• Database non-Hana

Business Warehouse, BW, 7.4, OBJECTS_OBJREF_NOT_ASSIGNED, BI_CONT, ADSO, dump, FACTORY, hana, non-hana, CL_RSDSO_DBTABLE_AQ, XPRA, upgrade, BI content. , KBA , BW-WHM-MTD , Metadata (repository) , BW-WHM-DBA-ADSO , DataStore Object (advanced) , Problem