** ERROR 226001 ** Found an error in the tetrahedral mesh.
The tetrahedral mesh is unsuitable for analysis either because the meshing process is not complete, or the mesh contains flat or inverted elements.
Check the Study Tasks pane to see whether the meshing process is complete. Select to check for defects in the mesh and, if necessary, correct them using and/or . If necessary, improve the quality of the Dual Domain mesh, for example by reducing the number of high aspect ratio triangles, then regenerate the 3D mesh.