- In order to test to delete process on purchase order. - I try to delete confirmed order and check Error Message. - !python {model: purchase.order}: | try: self.unlink(cr, uid, [ref("purchase_order_1")]) except Exception,e: pass - I delete a draft order. - !python {model: purchase.order}: | self.unlink(cr, uid, [ref("purchase_order_5")]) - I delete a cancelled order. - !python {model: purchase.order}: | self.unlink(cr, uid, [ref("purchase_order_7")])