That'll be because of the finer mesh on regular MVRC, but possibly suggests your STLs (specifically those not in the high res folder) are too thin for too long in a few places and break down during meshing on MVRC shortThe Rusted One wrote: ↑22 Oct 2024, 01:32Weirdly enough, I ran the cfd with the regular MVRC template instead the MVRC short template with identical geometries and everything seems to work just fine............