How to append contents of a local object to dynamic internal table ?

Question

Dear ABAP-Specialists,
i am trying to append contents of a local object to a dynamic table. The most relevant lines are the ones written in bold
I guess the append is the problem due to the reason that a unknown format has to be assigned to a fixed format somehow.
+METHOD wddomodifyview .+
  +DATA lo_ui_root                TYPE REF TO  if_wd_view_element.+
  +DATA lo_container              TYPE REF TO  cl_wd_uielement_container.+
  +DATA lo_table                  TYPE REF TO  cl_wd_table.+
  +DATA lo_table_column           TYPE REF TO  cl_wd_table_column.+
  +DATA lv_tabname                TYPE         tabname.+
  +DATA lt_output                 TYPE TABLE OF sychar512.+
  +DATA lo_data TYPE REF TO data.+
  +DATA:+
    +lo_node_output_data                    TYPE REF TO if_wd_context_node,+
    +lo_node_table_list                     TYPE REF TO if_wd_context_node,+
    +lo_node_differences                    TYPE REF TO if_wd_context_node,+
    +lo_node_output                         TYPE REF TO if_wd_context_node,+
    +lt_all_elem_differences                TYPE        wdr_context_element_set,+
    +lo_elem_table_list                     TYPE REF TO if_wd_context_element,+
    +lo_elem_differences                    TYPE REF TO if_wd_context_element,+
    +ls_differences                         TYPE        if_table_differences=>element_differences,+
    +lt_differences                         TYPE STANDARD TABLE OF if_table_differences=>element_differences.+
  +FIELD-SYMBOLS:+
                 +<ls_output> TYPE ANY,+
                 +<lt_output> TYPE ANY TABLE.+
+     ....+
    +*CREATE DATA lo_data TYPE TABLE OF (lv_tabname).*+
    +*ASSIGN lo_data->* TO <lt_output>.*+
    +*LOOP AT lt_differences INTO ls_differences.*+
+**      APPEND ls_differences-ct_line TO lo_data->*.*+
    +*ENDLOOP.*     ....+
+ENDMETHOD.+
Thanks a lot in advance for your Ideas.
Best regards
Carsten Klatt
Please post in the correct forum and use code tags to format your code
Edited by: Rob Burbank on Oct 1, 2010 1:27 PM

Answer 1

This might help - you should not reference the data reference directly:
DATA: lt_t001 TYPE TABLE OF t001,
      ls_t001 TYPE t001.
DATA: lr_dref    TYPE REF TO data.
DATA: lv_tabname TYPE tabname.
FIELD-SYMBOLS: <lfs>      TYPE table,
               <lfs_line> TYPE ANY.
lv_tabname = 'T001'.
TRY.
    CREATE DATA lr_dref TYPE TABLE OF (lv_tabname).
    ASSIGN lr_dref->* TO <lfs>.
  CATCH cx_sy_create_data_error.
*     Do something
ENDTRY.
SELECT * FROM t001 INTO TABLE lt_t001.
LOOP AT lt_t001 INTO ls_t001.
  ASSIGN ls_t001 TO <lfs_line>.
  APPEND <lfs_line> TO <lfs>.
ENDLOOP.