TSV_ILLEGAL_REFERENCE while trying to append to dynamic structure

[Former Member]

Hi,

I create structure dynamically, but when I try to make an append (even the initial line), I get TSV_ILLEGAL_REFERENCE dump.

Here is my code:

  data: lr_strucdesc TYPE REF TO CL_ABAP_STRUCTDESCR,
        dref TYPE REF TO DATA,
  lr_strucdesc ?= cl_abap_typedescr=>describe_by_name( 'ZAK_STAT_DEF' ).
  CREATE DATA dref TYPE HANDLE lr_strucdesc.
  FIELD-SYMBOLS: <fs_table> TYPE INDEX TABLE.
  ASSIGN dref->* TO <fs_table> CASTING TYPE HANDLE lr_strucdesc.

  APPEND INITIAL LINE TO <fs_table>. " << dump is here

Any help appreciated!

Best regards,

Anton.

[rajesh_paruchuru]

> I create structure dynamically, but when I try to make an append (even the initial line), I get TSV_ILLEGAL_REFERENCE dump.
.

Here lies the issue, you are trying to append a record(initial) to a structure! the 'CASTING' addition doesn't help you to create a table out of a structure, extract from F1 help of 'CASTING' addition of 'ASSIGN' statement says:

"The specified data type must match the generic typing of the field symbol, which means that the casting may specialize the generic typing, but not generalize it"

Solution : create a dynamic table from the dynamic structure and append(initial) record to the dynamic table instead... how to create dynamic table? check the documentation of the method 'CREATE' of the class 'CL_ABAP_TABLEDESCR' or search the forum with the keyword "CL_ABAP_TABLEDESCR=>CREATE"

-Rajesh.

[Former Member]

Hello, Rajesh.

I suspected that problem was somewhere in my understanding of principles. Thank you for your answer, problem is solved now.

Here is the solution code:

 data: lr_strucdesc TYPE REF TO CL_ABAP_STRUCTDESCR,
        lr_tableref TYPE REF TO CL_ABAP_TABLEDESCR,
        dref TYPE REF TO DATA,
        linetype TYPE REF TO CL_ABAP_STRUCTDESCR,
        comp_tab     TYPE cl_abap_structdescr=>component_table.

FIELD-SYMBOLS: <fs_table> TYPE INDEX TABLE.
  
  lr_strucdesc ?= cl_abap_typedescr=>describe_by_name( 'ZAK_STAT_DEF' ).

  comp_tab = lr_strucdesc->get_components( ).
  
  linetype = cl_abap_structdescr=>create( comp_tab ).
  
  lr_tableref = cl_abap_tabledescr=>create(
   p_line_type = linetype
   p_table_kind = cl_abap_tabledescr=>tablekind_std 
  ).
 
 CREATE DATA dref TYPE HANDLE lr_tableref.
 ASSIGN dref->* TO <fs_table>.
 
 APPEND INITIAL LINE TO <fs_table>.