Error occurs while connecting the polygon contour.

During the generation of the Navmesh I recieve the following error:

Error occurs while connecting the polygon contour.

Is this a result of a bad 3D model? or something else? And can anyone explain whats happening behind the polygon contour?

It sounds like an internal problem when baking the navmesh.
Please submit a bug-report with a project/scene giving this error

also getting the same error in 4.1.3, previously worked fine with older versions.

breaks the navmeshagent behavior - even though the editor shows me the navmesh, the agent’s can’t navigate to various points on the navmesh. very frustrating.

will try and submit a bug ticket