Under the Warehouse Configuration page, Openerp 7 allows the users to "Track serial number on products". After ticking the option, the addon option is available, which is "Expiry date on serial numbers". I ticked the option, but it seems nothing happened. I browsed through the OpenERP tutorial and also checked different modules in Openerp, but I am not able to find the way to record the expiry date for the batch of products based on the serial numbers. Much appreciate that you could advise on the issue!