How do I remove intervals from civil geometry elements?
Locate the civil geometry element in Project Explorer>Civil Model. There you will see the name of the original geometry element as well as any intervals.
Highlight the name of the original geometry element, right-click to display the pop-up menu, and select Remove Intervals.
In my experience, I'm seeing entries like Complex Element: GeomCL1 without a GeomCL above it. The solution is to go deeper into the interval's tree and get into its DependsOn. Then right-click that Complex Element entry.