# Non-manifold of vtk delaunay

**URL:** <https://discourse.slicer.org/t/non-manifold-of-vtk-delaunay/39682>\
**Category:** Development\
**Created:** [October 14, 2024, 7:52am UTC](https://discourse.slicer.org/t/non-manifold-of-vtk-delaunay/39682 "2024-10-14T07:52:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sofia\_Gonzalez](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sofia_gonzalez/32/78172_2.png) [@Sofia\_Gonzalez](https://discourse.slicer.org/u/Sofia_Gonzalez)\
**Post date:** [October 14, 2024, 7:52am UTC](https://discourse.slicer.org/t/non-manifold-of-vtk-delaunay/39682/1 "2024-10-14T07:52:30Z")

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Hello everyone, I’m trying to calculate the diameter of a carotid making planes perpendicular to the flow of the blood, and I want to make that planes and then calculate the diameter, and it works, but in some points it gives me this error:

ERROR: In …\Filters\Core\vtkMassProperties.cxx, line 95  
vtkMassProperties (000001507ED79560): No data to measure…!

ERROR: In …\Filters\Core\vtkDelaunay2D.cxx, line 819  
vtkDelaunay2D (000001500F304260): ERROR: Edge [51 18] is non-manifold!!!

ERROR: In …\Common\ExecutionModel\vtkExecutive.cxx, line 784  
vtkCompositeDataPipeline (000001507EB4E5B0): Algorithm vtkDelaunay2D(000001500F304260) returned failure for request: vtkInformation (000001507EDAC7B0)  
Debug: Off  
Modified Time: 3127232  
Reference Count: 1  
Registered Events: (none)  
Request: REQUEST\_DATA  
ALGORITHM\_AFTER\_FORWARD: 1  
FROM\_OUTPUT\_PORT: 0  
FORWARD\_DIRECTION: 0

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<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [October 14, 2024, 9:12am UTC](https://discourse.slicer.org/t/non-manifold-of-vtk-delaunay/39682/2 "2024-10-14T09:12:21Z")

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You may consider the ‘Cross-section analysis’ module in SlicerVMTK extension.

Consider also giving comprehensive details about your workflow.