I'm trying to simulate exposure of MIDA model with tDCS electrodes. The two electrodes (anode and cathode) are perfectly shaped on MIDA's head and must be energized with a certain current intensity. To do so I'm using the LF magneto static vector potential solver. The two electrodes are modeled as PEC and a wire current source connects the two. Default properties of the solver are used. With this set up, the simulation fails and returns the error: "diverged (indefinite matrix)". Can I have some help understanding what I'm doing wrong?
I attach some pictures that might be helpful to understand the problem.
Thank you very much,