Topography to polysurface graphs have worked fine for me up to now, however, the image attached displays an issue and l cannot now create an adaptive fence following a toposurface via a model line sketch. Any help much appreciated. Urgent.
When l run the usual graph, with Vikrams topo to polysurface workaround, no fence adaptive families are placed. This appears to be due to the fact that no points are being projected and therefore not interesting the surface, thus no uplift in Z value.
Any assistance would be appreciated.
As stated in other post, download spring nodes and use the Mesh.ToPolySurface node.
Use the Topography.Mesh node from out-of-the-box dynamo and then plug it in to Mesh.ToPolySurface
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Just trying that suggestion out.
Jostein,
May l say you are a star. Many kind thanks for you prompt, swift response.
Brilliant 
@Gcf_Design Always remember do not forget to mark the post as solved if you find your answer. Your Welcome!
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How do l do this?
That does not show up on my screen.
This works for me but when I have a topography that has Subregions I get a null. Any way to retrieve the polysurface in those cases?