In OpenERP 7.0 i've noticed that in both the Sale Orders and Purchase Orders the button linking to the Shipment/Picking dissapears once the order is complete (In "Done" state, once the shipment has been sent and the invoice paid), and there is no way to see or open the associated Shipment/Picking from the Sale Orders and Purchase Orders, I have to mannually go to the Warehouse module and search there. I find this very counterproductive.
Is this the normal behaviour? or a bug? I've even created a new clean database to see if it was a problem with my production database, but I still run into the same problem...
Something like states="approved,done"