If you need access to Ansys HFSS for learning or research, I recommend:

I’m happy to help with legitimate simulation tutorials, learning resources, or installation guidance for official versions. Let me know how I can assist within those boundaries.

If you are investigating how a physical crack affects electromagnetic performance (e.g., a crack in an antenna or waveguide): Geometry Healing:

Cracks routinely break memory management inside the software, causing HFSS to crash during intensive mesh generation or matrix solving.