Contract number is empty?!?!?

Hello experts,

I noticed that, in EBP, when the customer changes the plant the contract number and contract item are empty!!!!

I made the following test:

In debug mode when I change the plant, and enter in BBP_DOC_CHANGE_BADI, the contract and item number are empty. In this Badi, we have a loop in the IT_ITEM table and we have a logic to "recover" the contract/item number.

The logic is like this:

LOOP AT it_item INTO ti_item_aux

IF ti_item_aux-ctr_item_number IS INITIAL.

MOVE ti_item_aux-yyctr_item_numb TO ti_item_aux-ctr_item_number.

MOVE ti_item_aux-yyctr_hdr_number TO ti_item_aux-ctr_hdr_number.

MOVE 'S' TO lc_update.

ENDIF.

IF lc_update EQ 'S'.

APPEND ti_item_aux TO et_item.

ENDIF.

ENDLOOP.

After the BBP_DOC_CHANGE_BADI occurs the BBP_DOC_CHECK_BADI.

In this logic, when I call the function 'BBP_PD_SC_GETDETAIL', the value of "ctr_hdr_number" is empty again.......

What is wrong?????

Thanks