Viscous layers failure for hex mesh

Hello to you all!

I have a very simple model that I am able to mesh using tetra and hex cells. The problem appears when I am trying to generate viscous layers. For tetra cells everything works fine, not for hexa.

I am trying to attach some pictures.

Viscous layers for tetra mesh

Viscous layers for hex mesh

Error in hex mesh generation.

Thank you!

P.S. Sorry for the mess in adding pictures, but as I am a new user I can only add one per post.

Hi, please upload the HDF file study such that we can try to reproduce the issue and escalate it to developers.
Regards.