I have a Site design that involved building a Terrain Element from a variety of Corridors and Linear Templates. I added the surface features from these as breaklines in case I needed to modify the DTM in InRoads. As it turns out, that was needed as I had to add some gridded points. I have deactivated rules so some edits could be made but now, Activating the rules fails and I can now no longer export the DTM to Native.
I have contours and triangles displayed but it tells me the Terrain must be Valid and Triangulated for the Export tool
How do I fix this?