Go into the simulation directory

~/.xschem/simulations

and run ngspice manually:

ngspice -i circuit_name.spice -a

Does this work? in xschem click

Simulation->Configure simulators and tools

, then check the first 'Ngspice' command, enable also the

status

checkbutton so xschem displays a status dialog box at simulation completion. Usualy the command line is the following:

$terminal -e 'ngspice -i "$N" -a || sh'

where $terminal is xterm by default,

$N

is the complete path of the xschem generated netlist (

~/.xschem/simulations/circuit_name.spice

)

-a

is the ngspice autorun command,

|| sh

tells to run a shell if the simulatiopn fails so you have time to read error messages before the xterm is closed. You can simplify the command as follows:

xterm -e 'ngspice -i "$N"'

if ngspice is not in the PATH environment variable list of directories you can set the full ngspice executable path:

xterm -e '/full/path/of/ngspice -i "$N"'