Error importing STL geometry "could not match up all facet edges"

I have errors when importing .stl files. The error is:

  "could not match up all facet edges"

Submitted Questions wrote

I have errors when importing .stl files. The error is:

  "could not match up all facet edges"

Edit: From FEATool Multiphysics v1.14.1 (and CFDTool v1.7.1) the newly introduced "Robust" grid generation option allows for most "difficult" 3D geometries to mesh successfully.



This error message means that there are too large "gaps" between the facets in your stl file resulting in a "non-watertight" geometry (mesh generators require "watertight" geometries with no gaps as input). Please see the following section in the documentation for reference:

https://www.featool.com/doc/geom.html#geom_cad_stl

To fix this you can possibly try to re-generate the stl file from the original data with a higher tolerance. Alternatively, FEATool Multiphysics (not available with CFDTool) includes a MATLAB function that can be used to try basic mesh repair:

https://www.featool.com/doc/mesh__repair_8m.html

or you can maybe try to find some other mesh repair software, see for example this linked article which contains tips for mesh repair techniques and recommended tools:

https://formlabs.com/blog/best-stl-file-repair-software-tools