3404544 - Dump in method IF_RSBK_REQUEST~WRITE_DYN_PAR from program CL_RSBK_REQUEST_STATE=========CP

DTP in "SAP HANA Execution" mode fails and the following dump occurs:

Category               ABAP programming error
Runtime Errors         OBJECTS_OBJREF_NOT_ASSIGNED
Except.                CX_SY_REF_IS_INITIAL
ABAP Program           CL_RSBK_REQUEST_STATE=========CP

  "OBJECTS_OBJREF_NOT_ASSIGNED" CX_SY_REF_IS_INITIAL
  "CL_RSBK_REQUEST_STATE=========CP" bzw. CL_RSBK_REQUEST_STATE=========CM05F
  "IF_RSBK_REQUEST~WRITE_DYN_PAR"

Source code:

   27         DATA(l_r_rspm_retr) = n_r_template->get_rspm_runtime( )->get_query_retrieve_ref( ).
   28
>>>>>         LOOP AT l_r_rspm_retr->retrieve_variant_data( l_r_rspm_retr->retrieve_process( p_r_p
   30           ASSIGNING FIELD-SYMBOL(<f_s_var>) WHERE role = if_rspm_constants=>co_role-source A
   31                                                   unmanaged = rs_c_false.
   32           CHECK cl_rspm_runtime_services=>is_distinct_request_storage( <f_s_var>-data_target

Call stack:

|    8 METHOD       CL_RSBK_REQUEST_STATE=========CP    CL_RSBK_REQUEST_STATE=========CM05F    29  |
|      CL_RSBK_REQUEST_STATE=>IF_RSBK_REQUEST~WRITE_DYN_PAR                                        |
|    7 METHOD       CL_RSBK_REQUEST===============CP    CL_RSBK_REQUEST===============CM05S    15  |
|      CL_RSBK_REQUEST=>IF_RSBK_REQUEST~WRITE_DYN_PAR                                              |
|    6 METHOD       CL_RSBK_CMD_PREPARE===========CP    CL_RSBK_CMD_PREPARE===========CM00B    13  |
|      CL_RSBK_CMD_PREPARE=>PREPARE_DATAPACKAGES                                                   |
|    5 METHOD       CL_RSBK_CMD_PREPARE===========CP    CL_RSBK_CMD_PREPARE===========CM009    26  |
|      CL_RSBK_CMD_PREPARE=>IF_RSBK_CMD_P~CHANGE_ALL                                               |
|    4 METHOD       CL_RSBK_PROCESS===============CP    CL_RSBK_PROCESS===============CM00Q   376  |
|      CL_RSBK_PROCESS=>PROCESS_REQUEST                                                            |

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RSBK018 , KBA , BW-WHM-DST-DTP , Data Transfer Process , Problem