Why is the estimate button / menu item in the main window grayed out (disabled)?

There are two possible reasons why the estimate button and/or menu item on the Estimate menu is grayed out (disabled) in MassTrack: 

1. No weight group is selected
2. There is no method defined for the selected weight group. See this article in the webhelp on how to define estimation methods. See also chapter 11 of the "Customizing MassTrack System Database in the online tutorial.