F4 Value Help not returning all the selected values to screen field in case of multiple selection.

I have implemented F4 help using the function module ‘F4IF_INT_TABLE_VALUE_REQUEST ‘ with parameter multiple choice = ‘X’. In this way I was able to select multiple values from the screen, but those selected values are not returned to the screen.

OBJ_ID remains blank. By reading the lt_return tab, I was only able to show one value and not the selected values from the value help.

PARAMETERS: ana_obj TYPE c AS LISTBOX VISIBLE LENGTH 20,
            obj_id  TYPE mdrs_mo_prx_name.

AT SELECTION-SCREEN ON VALUE-REQUEST FOR obj_id.
  PERFORM reports_f4.
  EXIT.

FORM report_f4.
CALL FUNCTION 'DDIF_FIELDINFO_GET'
    EXPORTING
      tabname        = lv_table_name
      fieldname      = 'MO_NAME'
      langu          = sy-langu
    TABLES
      dfies_tab      = lt_field_tab
    EXCEPTIONS
      not_found      = 1
      internal_error = 2
      OTHERS         = 3.

  CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
    EXPORTING
      retfield        = 'MO_NAME'
      dynpprog        = lv_repid
      dynpnr          = lv_dynnr
      dynprofield     = 'OBJ_ID'
      value_org       = 'S'
      multiple_choice = 'X'
      mark_tab        = it_mark
    TABLES
      value_tab       = lt_objects
      field_tab       = lt_field_tab
      dynpfld_mapping = lt_dynfieldmapping
      return_tab      = lt_return
    EXCEPTIONS
      parameter_error = 1
      no_values_found = 2
      OTHERS          = 3.
ENDFORM.