"Failure to triangulate surface"

When working with a “Subregion” on site topography, I have often come up with the issue of "Failure to triangulate surface". Well it's not really an issue, other than Revit’s Sub-region tool’s inability to correctly indicate where the line join problem is.


The workaround I often use is to copy the sketch of the sub region. Then start a new floor sketch, and “Paste Aligned” the sketch lines. Finish sketch will then indicate where the joins or “intersecting lines don’t meet. Trim them up and “Copy” and “Paste Aligned” that back to the “Subregion” tool, Finish sketch and problem resolved.



Floor Sketch


















Completed Sketch