Getting error in while changing sales order which is created using BAPI

Hi All,

I have created the sales order using BAPI ( BAPI_SALESORDER_CREATEFROMDAT1 ) and i am successfully creating sales order using this BAPI. But while i want to change sales order iam changing Shipping Conditions in Header Data of sales order .its giving an error .can any know any thing about this.

Error mesage : No status object is available for SDI 300082407/10 (Order Number/Item Number)

In Header i am passing these values ...

wa_order_header_in-doc_type = vbak-auart.

wa_order_header_in-sales_org = vbak-vkorg.

wa_order_header_in-distr_chan = vbak-vtweg.

wa_order_header_in-division = vbak-spart.

Do i required to pass the below values ? in Header structure ( BAPISDHEAD1 ).

REFOBJECTTYPE

REFOBJECTKEY

REFDOCTYPE

Regards,

Sudhakar Reddy A