Mesh Independence Study - Layering disappears across study meshes

Before I start down that road, I am now getting concerned about my 13mil mesh quality. From all my reading I am under the impression that that little ‘Mesh Operation Event Log’ message that says ‘Mesh quality check failed. The mesh is not OK.’ can usually be ignored. Perhaps in my case, I can not ignore it.

However, I have never been able to determine what that little error actually means and how to get rid of it, any ideas? (I think my Meshing Log ending does not help me, but I could be wrong)

Here is the message and the end of the Meshing Log:

EDIT; @Get_Barried, sorry to call you back but I can not proceed until I sort out this failure in quality error :upside_down_face:

Thanks,
Dale