BAPI_SALESORDER_CHANGE insert sales order item lines ERRORS

Question

Hello experts,
i have to insert new item lines for a given sales order document number.
i use bapi_salesorder_change but it does not work.
these are the messages in the return table:
Error 1.
Message: ORDER_HEADER_IN has been processed succesfully
Message: No item category available
Message: Error in ITEM_IN
Message: Condition cc_cond is not allowed as header condition
Message: Sales document was not changed
Error 2.
Message: ORDER_HEADER_IN has been processed succesfully
Message:Material is not defined for sales org., distribution chan, language DE {but i checked the table mvke with the matnr and sales org and distribution chanel and the material exists}
Message: Error in ITEM_IN
Message: Condition cc_cond is not allowed as header condition
Message: Sales document was not changed
here is the code:
  i_t_item-itm_number    = p_posnr.
  i_t_item-material      = p_matnr.
  i_t_item-target_qty    = p_qty.
  i_t_item-plant         = p_plant.
  i_t_item-hg_lv_item = p_uepos.
  i_t_item-price_date   = p_preisdat.
   i_t_item-prc_group2   = cc_prc_group.
  APPEND i_t_item.
*setting conditions
  i_t_bapicond-itm_number  = p_posnr.
  i_t_bapicond-cond_type   = cc_condition_type.
  i_t_bapicond-cond_value  = l_netwr.
  i_t_bapicond-conpricdat  = gc_datum.
  i_t_bapicond-currency    = cc_eur.
  APPEND i_t_bapicond.
  i_t_itemx-updateflag = cc_i. {= 'I'}
  i_t_itemx-itm_number = p_posnr.
  i_t_itemx-material      = cc_x.
  i_t_itemx-target_qty    = cc_x.
  i_t_itemx-plant         = cc_x.
  i_t_itemx-hg_lv_item    = cc_x.
  i_t_itemx-price_date    = cc_x.
  i_t_itemx-prc_group2    = cc_x.
  APPEND i_t_itemx.
  i_t_bapicondx-updateflag = cc_i.{'I'}
  i_t_bapicondx-itm_number = p_posnr.
  i_t_bapicondx-cond_type = cc_x.
  i_t_bapicondx-cond_value = cc_x.
i_t_bapicondx-conpricdat = cc_x.
  i_t_bapicondx-currency = cc_x.
  append i_t_bapicondx.
  CLEAR: l_behave, sy-subrc.
  CLEAR i_t_header.
  i_t_header-updateflag = cc_u. {='U'}
  APPEND i_t_header.
  CALL FUNCTION 'BAPI_SALESORDER_CHANGE'
    EXPORTING
       salesdocument               = sales_ord_number
   ORDER_HEADER_IN       =
       order_header_inx            = i_t_header
       simulation                      = cc_x
       behave_when_error         = l_behave
   INT_NUMBER_ASSIGNMENT       = ' '
   LOGIC_SWITCH                =
    TABLES
       return                              = i_t_return
       order_item_in                  = i_t_item
       order_item_inx                = i_t_itemx
   PARTNERS                        =
   PARTNERCHANGES              =
   PARTNERADDRESSES            =
   ORDER_CFGS_REF              =
   ORDER_CFGS_INST             =
   ORDER_CFGS_PART_OF          =
   ORDER_CFGS_VALUE            =
   ORDER_CFGS_BLOB             =
   ORDER_CFGS_VK               =
   ORDER_CFGS_REFINST          =
   SCHEDULE_LINES         =
   SCHEDULE_LINESX             =
       order_text                    = i_t_text
   ORDER_KEYS                  =
       conditions_in               = i_t_bapicond
       conditions_inx             = i_t_bapicondx
     extensionin                 = i_t_extensionin.
  IF i_t_return-type EQ cc_s OR i_t_return-type EQ cc_w OR i_t_return-type EQ cc_i.
    CALL FUNCTION 'BAPI_TRANSACTION_COMMIT'
      EXPORTING
        wait = cc_x.
    PERFORM return_code.
  ELSE.
    p_flag = cc_x.
    PERFORM return_code_err.
to rollback the transation for error records
    CALL FUNCTION 'BAPI_TRANSACTION_ROLLBACK'.
  ENDIF. " IF i_t_return-type EQ 'S'
i hope you can tell me where my code is wrong.
Best Regards,
Emilia

Answer 1

Hello ,
Error 2
i checked about the material number and it seems that everything is in order.
so this is not the problem.:(
Error 1
about the item category error: do i get this error because i don't fill the field ITEM_CATEG?
Error 1 and Error 2
About Message: Condition cc_cond is not allowed as header condition
i really don't undesrtand what this is about.
thank you for your answer.
Best regards,
Emilia