VL02N - Update Serial No

Hi guys,

I'm having some issues getting 'WS_DELIVERY_UPDATE_2' to work. It's not updating the serial no in my delivery.

The serial no I want to update is in VL02N under Extras->Serial Numbers.

Any help would be greatly appreciated.

Many Thanks,

Philip Johannesen

Code below:

DATA:vbkok LIKE vbkok,
     lt_serno TYPE STANDARD TABLE OF HUM_REP_SERNR,
     wa_serno LIKE LINE OF lt_serno.

 MOVE '0080001456' TO vbkok-VBELN_VL.


 MOVE '1' TO wa_serno-ZEILE.
 MOVE '12345' TO wa_serno-sernr.
 APPEND wa_serno TO lt_serno.

CALL FUNCTION 'WS_DELIVERY_UPDATE_2'
  EXPORTING
    VBKOK_WA                           = vbkok
*   SYNCHRON                           = ' '
*   NO_MESSAGES_UPDATE_1               = ' '
    COMMIT                             = 'X'
    DELIVERY                           = '0080001456'
*   UPDATE_PICKING                     = ' '
*   NICHT_SPERREN_1                    = ' '
*   IF_CONFIRM_CENTRAL                 = ' '
*   IF_WMPP                            = ' '
*   IF_GET_DELIVERY_BUFFERED           = ' '
*   IF_NO_GENERIC_SYSTEM_SERVICE       = ' '
*   IF_DATABASE_UPDATE_1               = '1'
*   IF_NO_INIT_1                       = ' '
*   IF_NO_READ_1                       = ' '
*   IF_ERROR_MESSAGES_SEND             = 'X'
*   IF_NO_BUFFER_REFRESH               = ' '
*   IF_NO_MES_UPD_PACK                 = ' '
* IMPORTING
*   EF_ERROR_ANY                       =
*   EF_ERROR_IN_ITEM_DELETION          =
*   EF_ERROR_IN_POD_UPDATE             =
*   EF_ERROR_IN_INTERFACE              =
*   EF_ERROR_IN_GOODS_ISSUE            =
*   EF_ERROR_IN_FINAL_CHECK            =
* TABLES
*   VBPOK_TAB                          =
*   PROT                               =
*   VERKO_TAB                          =
*   VERPO_TAB                          =
*   VBSUPCON_TAB_1                     =
*   IT_VERPO_SERNR                     =
*   IT_PACKING                         =
    IT_PACKING_SERNR                   = lt_serno
*   IT_REPACK                          =
*   IT_HANDLING_UNITS_1                =
*   ET_CREATED_HUS                     =
*   TVPOD_TAB                          =
          .
   if sy-subrc <> 0.

   endif.