reverse goods issue in VF11

I have a request about when I cancel a billing document by VF11,the system can cancel the corresponding delivery document too.Is there any user exit can be use?

PS: I have tried inserting the function "ws_reverse_goods_issue" in including MV60AF0B_BELEG_SICHERN,after the function "rv_invoice_document_add",but the system raise exception"ERROR_REVERSE_GOODS_ISSUE",it may caused by table lock.Is there any solution to realize my request?