Making ac simulation of simple source-R-C-gnd serial circuit on eSim i always get flat curve at 0v.
Ngspice return, plot of Vsource(?!) and Vc, wich are both zero ...
Why is v source zero?
I tried with ac, sine and other sources, always the same.
If i add resistor R2 in paralel with C, then i get correct values for input Vs and output VR2, for the case of sweep of value of R2.
With that resistor in paralel with C, for ac analisis Vc and Vs are again zero.
Second nag is that making transient simulation i get already from ngspice one dimensiolal graf, values have extension only in y directon.
For all specified cases I have no error mesages from ngspice.
Can you please share the content of your *.cir.out file ?