Hello everyone, I have a question, I have been working on a layout, the LVS is correct, then I extracted parasites to perform a post-Layout simulation, when trying to simulate Ngspice shows me an error, the block mentioned is the symbol of the circuit to which I did layout and extraction of parasites, anyone knows why this is due, I attach images of the symbol and the .spice used.

looks like the names of the subcircuit instance and definition do not match,

.subckt rectifier

The name in my previous message "rectifier_extparas" was put to differentiate the file from the test bench file, the simulation that I always do has the right names, I attach a screenshot of the .spice of the parasites.

@Antony Brayan Sanabria Calderón What @Manuel M is saying is that the subckt defined in

rectifier_extparas.spice

is

rectifier

but the instance referenced in

rectifier_lvs_01v8_tb.spice

is

rectifier_lvt_01v8

. Either rename the subckt in

rectifier_extparas.spice

to

rectifier_lvs_01v8

or change the

x1

instance referenced in

rectifier_lvs_01v8_tb.spice

to

rectifier

.

Hi David, thanks for your reply, I did the change in my files and the console shows me that ngspice doesn't start the simulation, I appreciate the help with this new problem.