Calculix doesn't output results for very large meshes in the default solver option.

[joonryu69]

I appreciate the great implementation that you have made for Freecad, but I had some issues regarding massive meshes.
I am having a general issue of not getting any results out of Calculix whenever the mesh size is huge. For example, it seems to happen when the mesh has more than 1 million nodes. Please refer to this thread I posted in the Freecad forum: https://forum.freecad.org/viewtopic.php?p=728901#p728901

I did find a way to make it work by selecting either of the iterativescaling or iterativecholesky option rather than the default solver option. However, the beso implementation seems to stop functioning when using the iterative solver options. It works to the point where file000.12d, file000.cvg, file000.dat, file000.frd, file000.sta, and etc are created but after that, it simply stops the process and cpu utilization goes to idle while still having all the ram loaded up with the data. I tried leaving it for multiple hours, but it appears to be stuck. Do you have any ideas of what might be a issue here?