An updated version of Spice3f5 is available, which now supports SPICE2-like POLY E,F,G,H sources and also a working PZ (pole/zero) analysis mode. The former are translated internally to arbitrary nonlinear sources, with no limit on degree. The latter was in the original 3f5 code, but suffered a number of problems, often failing to achieve a solution, or getting it wildly wrong. This was tracked down to a number of simple errors, plus some more fundamental errors e.g in the complex sparse matrix code and a faulty implementation of Muller’s method. The latest code is version 11.