Solved the problem, it turns out that if you have multiple circuits and the= currents in both are set to zero, the solver loops. Nobody else here into FEMM? Surprising. It's pretty capable, and once you= get your head into it, the LUA scripting makes it much easier to create yo= ur geometry parametrically. PrimaryTurns =3D 3, PrimarySpacing =3D 3*mm, t= hat sort of thing. -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Van Ho= rn, David Sent: Friday, April 13, 2018 11:31 AM To: Microcontroller discussion list - Public. Subject: [EE] FEMM users here? I'm having trouble with a LUA script that gets hung in analyze forever. "Matrix construction" seems to run forever. When I stop, I get a message "problem loading mesh". -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO 80301 USA phone: 303-417-1345 x110 email: david.vanhorn@backcountryaccess.com -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .