Why is the new Lumerical HEAT not running well?
I have just started using Lumerical 2021 R2 (the version I've been using before this was 2019b), and I have some trouble with HEAT. Models that ran in the older version now don't run in this new version. The meshing part is fine, but when it gets to initialization, the text turns red and the program stops. The error message just says the program has crashed. I had this issue occasionally with the older version as well, but by playing with the meshing settings, it usually disappears. For this new version, it appears to be more difficult to get around. Also this new programs seems to take a very long time "initializing" even when it eventually runs w/o error. I wonder what is going on and how do I get around the problem.
Incidentally, the graphics in the new version looks strange in wireframe view. There are extra lines that make the graph hard to read.