Defaulting dummy bidder

Question

I have to default a dummy Bidder , in BBP_BID_INV
I have added the following code in in DOC CHANGE BADI implementation
    IF et_partner IS INITIAL.
        SELECT SINGLE partner partner_guid FROM but000 INTO wa_dummy WHERE  
         bu_sort1 = 'DUMMY VENDOR'.
        IF sy-subrc EQ 0.
          CLEAR wa_partner.
          MOVE wa_dummy-partner_id   TO wa_partner-partner_id.
          MOVE wa_dummy-partner_guid TO wa_partner-partner_no.
          wa_partner-partner_fct = '00000018'.
          wa_partner-addr_type   = '1'.
          wa_partner-ADDR_ORIGIN = 'A'.
          MOVE is_header-guid TO wa_partner-p_guid.
          APPEND wa_partner TO et_partner.
        ENDIF.
      ENDIF.
This works fine , but as I see the document in BBP_PD , the same bidder is repeated many times , in the partner table. Perhaps as many times as the BADI is hit, as it_partner and et_partner are empty everytime.
To ensure the defaulting happens only once,  i used the FM
CALL FUNCTION 'BBP_PD_BID_GETDETAIL'
    EXPORTING
      i_guid          = is_header-guid
      i_with_itemdata = 'X'
    IMPORTING
      e_header        = wa_header_tab
    TABLES
      e_partner       = it_bidder.
and enclosed the above defaulting code under the condition
IF it_bidder IS INITIAL.
This works fine in SAPGUI , i can see the default bidder on screen , but this doesn't happen in ITS.
Any clue where i am going wrong.
Thanks in advance .
Regards
Alok Pathak

Answer 1

any inputs , anybody ?