next noob question: whilst trying out the commands from video https://xschem.sourceforge.io/stefan/xschem_man/video_tutorials/editing_and_sim.mp4 I tried to do simulation and it worked, but I could not plot the results (ngspice reported "Can't open viewport for graphics." - I guess this is not a xschem problem), and when I highlighted some nets in xschem and did "Send highlighted nets to GAW", a message appeared in the terminal from which xschem was started, saying gaw -> Current table not defined Does anyone have any hints about what I'm doing wrong?