I'm working with Hyperlynx DRC Free Edition 6.5.1 and obviously I'm running into an issue when working with an imported layer stackup. The import command loads successfully my PCB stackup:
But when I save the project file and reopen it, the stackup seems to be scrambled:
Any ideas? Do I have a buggy stackup or is it a HLDRC bug?
Even more interesting, the simulation works only with the "scrambled" stackup. With the original stackup the program crashes immediately.