** WARNING 702520 ** Nodes from the 3D part or insert tetrahedron elements are either inside its opposing tetrahedron element or quite a far distance from it. The Insert and Part elements are not matching up very well at the interface.
A node from adjacent insert tetrahedron and part tetrahedron elements at the part-insert interface are either inside the opposing element, or a substantial distance from it. This leads to poor element matching and a poor heat transfer simulation through the facets, which in turn can lead to solver convergence problems or poor quality results.
Ensure that the geometries at the interfaces are consistent and that the insert facets are on the same plane and of a similar dimension to those on the part.