vedama
Subscriber

So how do I fix it?

Image 1) I tried a much finer mesh and I get the same error.

Image 2) I converted the domain to polyhedra cells (against Fluent's recommendation) and I get the same error.

Image 3) I made it so there's only tetrahedrals (inviscid, no high aspect ratio boundary layer cells) and I get the same error.

Image 4) I converted tets-only grid to polyhedral cells and I get the same error.