Hi Karsten - it does look to me like a radius value that is too big - are you trying to fillet the inside corners? Those can go only up to a radius of 2.3 or so, while you have a radius of 2.6 in the crash dump.

The reason why it does not crash under regular MoI operation is that in the regular Fillet command the fillets are calculated asynchronously in the moi_commandprocessor.exe process and if they crash the crash is isolated to that worker process and not the main MoI process. In your case here it looks like it's calling Factory::calculate() which runs directly in the main process and will not be protected by the worker process isolation (if I remember right).

You may not want to call filleting in this way because it tends to not be very stable with bad inputs like radius values that are too large to fit in the available space.

- Michael