Things to check: 1. Ensure you have no other gaw/xschem instances open (iconified/minimized). 2. Your simulation must save a

inverter.raw

file. If you are running ngspice in interactive mode use a

.control ... .endc

section where after your

tran

or

dc

simulation you put a

write inverter.raw

statement. 3. you must open '`inverter.sch`' schematic explicitly as the top schematic (File -> Open) , not descend into it from a parent schematic 4. At the xschem command prompt type:

puts $gaw_tcp_address

, you should get

localhost 2020

as answer. 5. use the netcat command (nc) and do:

nc localhost 2020

in a terminal window when gaw is opened. Type a random command, do you get an answer from gaw? Like this:

schippes@mazinga:~ $ nc localhost 2020

dfdffdf

Bad command: 'dfdffdf'

If you get a '`connection refused`' message then for some reason gaw is not listening to tcp port 2020. Ensure your system is not already using this port, if this is the case use a different number changing the gawrc and xschemrc settings accordingly.

Thanks Stefan! It worked. I had the .raw in a different folder and also i was trying to use alt+g without opening gaw first. Once i did that it worked (sorry about that ).

Hi @Stefan Schippers - this helped. I installed gaw and set the port to 2020

@Matt Venn see this short clip about the possible reason...

thanks!