[Ryôzanpaku Tiger]

Dear all,

I have modified the OpenFOAM (v2212, OpenFOAM using Docker on macOS Ventura 13.2.1) tutorial case heatTransfer/chtMultiRegionFoam/snappyMultiRegionHeater by adding a sphere to the topAir part. A sphere is given by the STL file, located in resources/ folder, addded to the case floder.

The original case runs flawlessly, however, the updated case produces a FATAL ERROR when calling redistributePar utility:

Decomposition method scotch [4] (region sphere)
From time 0 mesh:"constant/sphere" have objects:4(rho cellToRegion p T)
[3] [0] 
[0] 
[0] --> FOAM FATAL ERROR: (openfoam-2212)
[0] Cannot find a patch which is not of type empty, mapped or coupled in patches 1(sphere_to_topAir)
There has to be at least one such patch for distribution to work
[0] 
[0]     From Foam::label Foam::fvMeshDistribute::findNonEmptyPatch() const
[0]     in file fvMeshDistribute/fvMeshDistribute.C at line 362.
[0] 
FOAM parallel run aborting

I also changed the endTime to 0.001 (just to run few steps and see the behavior of reconstructPar afterwards as well) and the number of processors to 4.

I checked thouroghly all modifications, but can't find the error. I would very appreciate any help or hint.

Here is a Dropbox link to the modified case: the modified case

Thanks!