Flushing & Cathicng Exceptions

Question

Hello ABAP-Experts,
I have a problem in understanding how to catch exceptions after calling method cl_gui_cfw=>flush.
Why calling "flush": Well, otherwise if there is no FLUSH after directory_create (for example) is called, the value of rc (methods internal return code) is checked prematurely.
Here my attempt:
" Calling method directory_create
call method cl_gui_frontend_services=>directory_create
      exporting
        directory                = tmpdir
      changing
        rc                       = returncode
      exceptions
        directory_create_failed  = 1
        cntl_error               = 2
        error_no_gui             = 3
        directory_access_denied  = 4
        directory_already_exists = 5
        path_not_found           = 6
        unknown_error            = 7
        not_supported_by_gui     = 8
        wrong_parameter          = 9
        others                   = 10.
      sy-subrc = my_sy_subrc " <=== ???!
" Calling method flush
call method cl_gui_cfw=>flush
  exceptions
    cntl_system_error = 1
    cntl_error        = 2
    others            = 3.
      sy-subrc = my_sy_subrc2 " <=== ???!
Now my problem: How can I be sure to catch the execeptions of method cl_gui_frontend_services=>directory_create (1 to 10), since the flush method has its own exceptions (1 to 3)? After calling flush, I think they are overwritten by the flush exception -- checking them before the flush makes no sense, because the method is probably not executed (Automation queue).
(Background: I am writing test-programs for some frontend methods, and want to catch all possible exceptions and to write them in a internal table, so that I can see which method crashes.)
I hope my problem is clear and someone can clarify.
Thanks a lot in advance
Regards
Jasmin

Answer 1

Hi,
You can rely on the SUBRC after calling the directory_create because the flush is already present in it
Look at the code of the method :
>    call method handle->call_method
>     exporting
>        method  = 'CreateDirectory'
>        p1      = directory
>        p_count = 1
>        queue_only = ' '
>      importing
>        result = rc
>      exceptions
>        others = 1.
>
>    if sy-subrc <> 0.
>      raise cntl_error.
>    endif.
>
>    call method cl_gui_cfw=>flush
>      exceptions
>        cntl_system_error = 1
>        cntl_error        = 2
>        others            = 3.
>    if sy-subrc <> 0.
>      raise cntl_error.
>    endif.