Hi Chrisb!
In that example, I will no longer be able to simulate the sequence of steps. If I load that sketch in Freecad (0.18), then the program crashes just by touching the mouse on the desktop. I don't want to waste any more time on this. Perhaps it was worth trying to edit the config files described in Bance message. But I'm sorry to waste time on this.
Sometimes programmers joke: "You don't need to fix mistakes, so as not to make new ones. Errors should be documented"
Regards, Friv.