How can I use the value returned for a function into the macro ??

Question

I create a function to work in a macro and I would like to use the value of parameter f_calc_error returned by function in a condition like IF, but I don't know how can I do that. I have to use the macro function CALC_ERROR ??
  Thanks.
Edson Suzuki

Answer 1

Hi Edson,
Yes you need to use the CALC_ERROR macro function to be able to test whether the last macro function returned an error. CALC_ERROR will return an 'X' if there an error occured during the execution of the last macro function.
You can use a macro similar to the following:
IF
  CALC_ERROR( )
  = 'X'
      DO SOMETHING HERE
ENDIF
Let me explain how this works internally. The SAP system maintains a global variable g_flg_calc_error during the execution of macros in the planning book. The g_flg_calc_error variable will contain the value of f_calc_error that was set by the last macro function which executed. The ABAP coding of a planning book is something like this:
data: g_flg_calc_error type /SAPAPO/FLAG.
* SAP will pass g_flg_calc_error variable to all macro
* functions. When SAP calls a macro function, it does
* something like this.
call function '/SAPAPO/MACRO_FUNCTION_HERE'
        exporting
          plob_values      = i_s_adv_plob_values
          sdp_book         = g_c_advf_sdp_book
          sdp_view         = g_c_advf_sdp_view
        tables
          cols_index       = i_t_cols
          value_tab        = l_t_value_tab
        changing
          f_calc_error     = g_flg_calc_error
As you can see, the g_flg_calc_error variable
is passed in the "changing" part of the call. The macro  function being called can then use the f_calc_error
variable to change the value of the global
g_flg_calc_error variable. In fact, the macro function being called can also check (by looking at the f_calc_error variable) if the last macro function reported an error.  The CALC_ERROR macro function just checks the value of f_calc_error parameter (w/c in fact is the value of the g_flg_calc_error variable) and returns "true/X" if the f_calc_error was set to true by the last macro function.
Hope this helps in clearing things out