Ok Michael.

I understand that you need a 3dm file to test.

But unfortunately today I'm very busy at work and I didn't find a bunch of minutes to find the 3dm file that caused the issue...

I will try my best to find it and send to you.

If I remember correctly when I had the issue I was performing a Fillet command on a messy geometry.
I was doing nothing serious, only a quick and dirt 3D doodle while I was waiting the compiling of my AndroidStudio projects.

So maybe I've discarded the model after the crash.

I will try to reconstruct what I was doing to replicate the issue.

I will let you know.

Have a nice day.