Last system won't go to right side margin

In the attached screenshot, I am in engrave mode, the last system will not go to the right side margin. This is where I want the system break. How to make it do that? It is going to the printer in the morning, would appreciate making this last system look right. Thank you!
2017-05-31 Last System problem to Dorico.JPG

Go to Layout Options -> Note Spacing -> Only justify final system in flow. Set some smaller value - 50% ought to do it.

Alternatively, switch the checkbox for that option off altogether.

Thank you Daniel for your quick reply…I’m going to meet my deadline with a beautiful looking score!