@User: If you can send me a tarball of a failing case (just the two netlists and setup file), then I can start looking at the problem. There is some sort of "trivial symmetry" for which a whole bunch of devices can be handled all at once. If you have a large array and netgen has to break symmetry device by device, it takes freaking forever. Your circuit seems to have both kinds of symmetry, which means I have to figure out how to handle it efficiently and automatically.