When a Scale Ticket is made for a Delivery Ticket type and does not have a valid product selected, it will not be available to import into the Delivery Ticket using the Import Scale Ticket button.
In order for this Scale Ticket to be available, choose the product on the Delivery Ticket, and double click in the Gross column. This shows the Scale Tickets that are available to import for the selected customer.
The Scale Ticket should now be shown and able to be imported.
In order to ensure Scale Tickets will easily be found in the future, it is recommended that two options are enabled. In Agvance Scale Interface at Setup / Company Preferences, select the checkboxes for Require a Product for Delivery Ticket Records and Product Must be Valid.