Received those meshing error in the F1 first tutorial:
Illegal triangles were found after surface tesselation. There could be a problem with the CAD geometry. Trying to proceed anyway.
The tesselated surface is not closed. There could be a problem with the CAD geometry (such as self-intersections). Please inspect your geometry. Trying to proceed anyway.
The meshing has been already running 45 minutes, not completed yet. Should I be concerned?