Cannot Create Curtain Panel
You may encounter this error when creating sloped glazing or a curtain element where the layout cannot support a small panel or mullion.
Curtain Wall Not Visible
You may encounter this issue when the Walls category is not visible in the view.
Invalid Curtain Panel
You may encounter this warning when 2 grid lines almost meet at a border of the curtain wall or sloped glazing, but not exactly at a point. The curtain panel cannot be displayed.
Non-System Panel Families
You may encounter this warning when a curtain wall with non-system panels joins to a roof, and the curtain wall does not have a rectangular shape.