There was some discussion here about Modelica.Electrical.Machines.Examples.InductionMachines.IMC_YD being numerically extremely challenging when touching the tolerance.

We now see this for System Modeler even with the tolerance that is set in the model, where it just "gets stuck" (or moves forward very very slowly) with hundreds of thousands of function evaluations. Playing around with step size, tolerance or changing to CVODES all can make it work again, or make it get stuck even worse.

Given that two different tools have now shown these problems, I will blame this on the model.