Reply To: Pivot error – Ansys Electrical

[dlooman]

Assuming the volt dof is constrained somewhere, this is usually caused by large differences in the resistivity.  There are only so many significant figures in a numerical analysis (~16) and when material properties vary by more than say 12 orders of magnitude you run into that fact of life.  Sometimes users specify an arbitrarily large value of resistivity to model a non-conductor like air or water.  A value of 1.0 is already an extremely large resistivity and the results will be more or less the same with a value of 1.0 as with 1.0e12.