Luiza

I am having a similar problem when simulating a differential circuit (using the s-parameter file of a balun). I keep getting the following warning: no pivot != 0 found during Crout LU decomposition As a result, when I try to plot any signal, all the harmonics are null. If I force it to be single ended (by using one different port at each input) I have no warnings. Does anyone have any idea on how to solve this? PS: I'm using the graphical interface, not qucsator.