Cannot split toposurface in revit

Unable to split Toposurface baked into revit with “Convert Topo Mesh to Revit Topo” component.

It has come in as topography surface. I can move it around just cannot split it.

Topo by Mesh limits the editing options in Revit, you can’t add points or split. Use the Topo by Points for more options.

I believe this is because the topo by mesh can have holes, where the a topo made from points is strictly interior and exterior points.

thanks @Japhy , that seems to work well.