@User yes ngspice defaults to everything lowercase. May be i can add the upper->lowercase translation too. I already allow 'vout' as well as 'v(vout)', so adding 'VOUT' and 'V(VOUT)' makes sense. There is no drawback in doing so, since the standard for spice netlists is they are case insensitive, so there never will be matching upper/lowercase nodes in any netlist.