# "Edge not recovered, polygon fill suspect" with "shortest distance on surface"

**URL:** <https://discourse.slicer.org/t/edge-not-recovered-polygon-fill-suspect-with-shortest-distance-on-surface/27602>\
**Category:** Support\
**Created:** [February 2, 2023, 3:01pm UTC](https://discourse.slicer.org/t/edge-not-recovered-polygon-fill-suspect-with-shortest-distance-on-surface/27602 "2023-02-02T15:01:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Deep\_Learning](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/deep_learning/32/15345_2.png) [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Post date:** [February 2, 2023, 3:01pm UTC](https://discourse.slicer.org/t/edge-not-recovered-polygon-fill-suspect-with-shortest-distance-on-surface/27602/1 "2023-02-02T15:01:59Z")

</div>

I am getting the following error when marking up on a surface/model:

[VTK] vtkDelaunay2D (0000024030965F60): Edge not recovered, polygon fill suspect

[VTK] - Warning: Warning: In D:\D\P\S-0-build\VTK\Filters\Core\vtkDelaunay2D.cxx, line 1409

It is very reproducible with my own hi-res CT data, but I would not reproduce it with the sample CT data (head and heart). No problem with spline measurements.

Any idea what the error message mean or how to troubleshoot?