In V6 I could use “Add Signals” to plot a MOSFET drain current. For instance Id(M1) would appear in the list of available signals. In V7 I only see I(M1) in the list of available currents. When I try to plot I(M1) I get the following error: Error: vector I(M1) not found!
If I run the netlist in ngspice from the command line I am able to plot current with the following command: plot m1:d#branch