Hi Peter,
Sorry but I don't find the same result as yours...
I installed following release this morning:
ElmerFEM-gui-nompi-Windows-AMD64.exe 2023-12-05 05:30 152M
I also noticed that the solver MgDynPost gives a SIGSEGV error, and only the MgDyn2DPost solver works, but I still don't see the magnetic field lines going in the inner CC region (while yours looks very correct!).
Could you please send me your sif file so that I can look at the details? Probably I am making a mistake somewhere.
Thanks in advance for your help and we keep us informed.
Roland