Problem: ITinEdit.AddFromFeatureClass with points may add node that isn't associated with a triangle
In some cases, building a TIN from a point feature class can result in a node that is not associated with any triangles. The node should contribute to the surface definition but does not. This hanging node can result in errors when attempting to use it with the following COM members:
This is a known problem.
Solution or Workaround
No solution at this time.