Start the design of the add-on by clicking the button directly in the input table. As an alternative, you can select the timber design in the "To Calculate" dialog box, use the button in the toolbar, or start the design together with all other results by using the "Calculate All" button.
The Calculation Progress window is displayed after starting the calculation, and shows the calculation steps as well as the current course of the calculation.
Then, the results of the timber design are available.