BBP_PD_PO_UPDATE not working

Hi SRM Gurus,

I have to implement a functionality where in a new line item needs to be copied in the Purchase order. For this , I have coded in the BBP_DOC_CHANGE_BADI. The new item has been added after user clicks on a copy field in the PO line item.

But, the BBP_PD_PO_UPDATE function module is not behaving as desired. When I export the items in the ET_ITEM in the BBP_DOC_CHANGE_BADI ( method PO_CHANGE), the new line item does not get imported in the BBP_PD_PO_UPDATE .

Can you please help me on this problem ?

Thanks and Regards,

Anu