Cl_gui_custom_container Problem

Question

HI Gurus,
I have defined a variable g_custom_container as below,
g_custom_container type ref to cl_gui_custom_container,
and I am cheking in the program for its initial value as
if g_custom_container is initial.
    perform create_and_init_ct1_alv changing gt_outtab[]
                                         gt_fieldcat.
  endif.
Now,
when I am executing the program, its not going inside the if condition becouse the value of the  g_custom_container is not initial ,
Please tell the way to set g_custom_container to its initial value.

Answer 1

My code for calling the module is
*&      Module  ct1_PBO  OUTPUT
      text
module ct1_PBO output.
*call method g_custom_container->free.
if g_custom_container is initial.
    perform create_and_init_ct1_alv changing gt_outtab[]
                                         gt_fieldcat.
  endif.
endmodule.                 " ct1_PBO  OUTPUT
and the definition of perform create_and_init_ct1_alv changing gt_outtab[]
                                         gt_fieldcat.
is
FORM create_and_init_ct1_alv CHANGING pt_outtab LIKE gt_outtab[]
                                  pt_fieldcat TYPE lvc_t_fcat.
  DATA: lt_exclude TYPE ui_functions.
        g_container = 'ZEXC_REC_CT1'.
  CREATE OBJECT g_custom_container
         EXPORTING container_name = g_container.
  CREATE OBJECT g_grid
         EXPORTING i_parent = g_custom_container.
Create Objekt to verify input values.
(This object is already needed in form SELECT_DATA).
  CREATE OBJECT g_verifier.
  SET HANDLER g_verifier->handle_data_changed FOR g_grid.
  PERFORM select_data CHANGING pt_outtab[].
Build fieldcat and set columns LFIMG VRKME
NETPR WAERS edit enabled.
  PERFORM build_fieldcat CHANGING pt_fieldcat.
  PERFORM exclude_tb_functions CHANGING lt_exclude.
  gs_layout-stylefname = 'CELLTAB'.
  CALL METHOD g_grid->set_table_for_first_display
    EXPORTING
      it_toolbar_excluding = lt_exclude
      is_layout            = gs_layout
    CHANGING
      it_fieldcatalog      = pt_fieldcat
      it_outtab            = pt_outtab[].
Set editable cells to ready for input initially
  CALL METHOD g_grid->set_ready_for_input
    EXPORTING
      i_ready_for_input = 1.
ENDFORM.  "CREATE_AND_INIT_ALV
when I am executing the program it is showing me the previous values because it is not going inside the if condition .
I also used the statement
call method g_custom_container->free.
but its giving runtime error.
Please suggest the solution.
Please suggest.