Getting error when passing custom fields to BAPI extension

Question

Hi ,
I have problem with standard BAPI_PO_CREATE1 bapi function.
ERROR DETAILS
when FM:- BAPI_PO_CREATE1 first time executed  getting error  "Check item number 30 in table EXTENSIONIN" and PO not creating.
when using function key reverse(cntl+f12) in BAPI_PO_CREATE1 in same execution ,po document  creating ,but data is not papulating custom field.
CODE USING IN MY PROGRAM
DATA : 
       ltab_extensionin TYPE TABLE OF bapiparex,
       wa_extensionin TYPE bapiparex,
       wa_BAPI_TE_MEPOITEM type BAPI_TE_MEPOITEM.
wa_bapi_te_mepoitem-po_item = wa_itab-item.
wa_bapi_te_mepoitem-zvsart  = wa_itab-ship_type.
move 'BAPI_TE_MEPOITEM' to wa_extensionin-structure.
move wa_BAPI_TE_MEPOITEM to  wa_extensionin-VALUEPART1 .
APPEND wa_extensionin TO ltab_extensionin.
   CALL FUNCTION 'BAPI_PO_CREATE1'
    EXPORTING
      poheader         = wa_pohead
      poheaderx        = wa_poheadx
      testrun          = ' '
    IMPORTING
      exppurchaseorder = v_po_number
    TABLES
      return           = itab_return
      poitem           = itab_poitem
      poitemx          = itab_poitemx
      poschedule       = itab_posched
      poschedulex      = itab_poschedx
      poshipping       = itab_poshipping
      poshippingx      = itab_poshippingx
      extensionin      = ltab_extensionin.
Could one of u help me ?? .
Regards,
Nayak

Answer 1

Hi,
Try populating the ltab_extensionin as the code given below:
Maybe it can help you.
Constants: c_flag_bape_vbak TYPE  char10 VALUE  'BAPE_VBAK', " Constant
                 c_flag_bape_vbakx TYPE char10 VALUE  'BAPE_VBAKX'," Constant
  wa_bape_vbap-vbeln             = space.
   wa_bape_vbap-posnr            = wa_order_items_in-in_linenumber.
   MOVE c_flag_bape_vbak TO wa_extensionin-structure.
   MOVE c_flag_bape_vbap TO wa_extensionin-structure.
   CALL METHOD cl_abap_container_utilities=>fill_container_c
     EXPORTING
       im_value       = wa_bape_vbap
     IMPORTING
       ex_container = wa_extensionin-valuepart1.
   APPEND wa_extensionin TO it_extensionin.
   CLEAR : wa_extensionin.
   MOVE c_flag_bape_vbapx TO wa_extensionin-structure.
   wa_extensionin-valuepart1+0(10) = space.
   wa_extensionin-valuepart1+10(6) = wa_order_items_in-in_linenumber.
   wa_extensionin-valuepart1+80(3) = abap_true.
   APPEND wa_extensionin TO it_extensionin.
   CLEAR : wa_extensionin.
Regards,
Shweta