Error in declaration

Question

Hi when i declare as below:
DATA: ws_grid_100     TYPE REF TO   cl_gui_alv_grid,
      ws_grid2_100    TYPE REF TO   cl_gui_alv_grid,
      ws_cont1_100    TYPE REF TO   cl_gui_docking_container,
      ws_cont2_100    TYPE REF TO   cl_gui_docking_container.
and execute the program i get the error "*** illegal reference ***"
can any one help me understand y this is coming?

Answer 1

Hi Neha,
  It would have be better if you would have attached the short dump. In absense of that, prima facie, it appears as if you are using the variables prior to instantiating them. Make sure you have following coded after the declaration and before the call to any instance method of  ws_grid_100 or ws_grid2_100 -
CREATE OBJECT ws_cont1_100
  EXCEPTIONS
    cntl_error                  = 1
    cntl_system_error           = 2
    create_error                = 3
    lifetime_error              = 4
    lifetime_dynpro_dynpro_link = 5
    OTHERS                      = 6.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
             WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
CREATE OBJECT ws_cont2_100
  EXCEPTIONS
    cntl_error                  = 1
    cntl_system_error           = 2
    create_error                = 3
    lifetime_error              = 4
    lifetime_dynpro_dynpro_link = 5
    OTHERS                      = 6.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
             WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
CREATE OBJECT ws_grid_100
  EXPORTING
    i_parent          = ws_cont1_100
  EXCEPTIONS
    error_cntl_create = 1
    error_cntl_init   = 2
    error_cntl_link   = 3
    error_dp_create   = 4
    OTHERS            = 5.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
             WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
CREATE OBJECT ws_grid2_100
  EXPORTING
    i_parent          = ws_cont2_100
  EXCEPTIONS
    error_cntl_create = 1
    error_cntl_init   = 2
    error_cntl_link   = 3
    error_dp_create   = 4
    OTHERS            = 5.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
             WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
In case problem still persists, please attach the dump (and list the code, if possible) to enable pinpointing the erroneous code.
-Abhijeet.