2373027 - Dump OBJECTS_OBJREF_NOT_ASSIGNED when displaying transformation

When displaying a transformation or executing its respective DTP, the following short dump is triggered:

Category ABAP programming error
Runtime Errors OBJECTS_OBJREF_NOT_ASSIGNED
Except. CX_SY_REF_IS_INITIAL
ABAP Program CL_RSTRAN_READ_DB=============CP
Application Component BW-WHM-DST

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

"OBJECTS_OBJREF_NOT_ASSIGNED" CX_SY_REF_IS_INITIAL
"CL_RSTRAN_READ_DB=============CP" bzw. CL_RSTRAN_READ_DB=============CM019
"_SELECT_ROUTINE"

...
35 ls_formula-tranid = p_tranid.
36 ls_formula-objvers = p_objvers.
37 ls_formula-ruleid = <ls_steprout>-ruleid.
38 ls_formula-stepid = <ls_steprout>-stepid.
39 ls_formula-formulaid = <ls_steprout>-codeid .
>>>>> ls_formula-formula = lr_formula->get_formula_as_string( ).
...

14 METHOD CL_RSTRAN_READ_DB=============CP CL_RSTRAN_READ_DB=============CM019 40
CL_RSTRAN_READ_DB=>_SELECT_ROUTINE
13 METHOD CL_RSTRAN_READ_DB=============CP CL_RSTRAN_READ_DB=============CM01A 21
CL_RSTRAN_READ_DB=>_SELECT_RULE
12 METHOD CL_RSTRAN_READ_DB=============CP CL_RSTRAN_READ_DB=============CM00J 6
CL_RSTRAN_READ_DB=>READ_ALL
11 METHOD CL_RSTRAN_READ_DB=============CP CL_RSTRAN_READ_DB=============CM003 36
CL_RSTRAN_READ_DB=>FACTORY
10 METHOD CL_RSTRAN_READ_DB=============CP CL_RSTRAN_READ_DB=============CM012 3

• SAP NetWeaver 7.5

display, transformation, OBJECTS_OBJREF_NOT_ASSIGNED, CX_SY_REF_IS_INITIAL, _SELECT_ROUTINE, CL_RSTRAN_READ_DB, RSTRANSTEPROUT , KBA , BW-WHM-DST-TRF , Transformation , BW-WHM-DST , Data Staging , Problem