When I simulate the inverter testbench from lab 1 in my personal machine I get the following fatal errors. How could I solve this?

@Tiago Silva remove pclm and drout parameters from FETs,netlist and try

How can I do that? @SUMANTO KAR

@Tiago Silva try searching for the same in the SPICE file

What spice file are we talking about? The actual nfet spice file inside sky130A/libs.ref/sky130_fd_pr/spice?

@Tiago Silva it's working in your login. See:

I know, as I said, the problem is occurring in my personal machine.

@Tiago Silva please send the spice netlist here once

Which netlist?

inverter_tb.spice

Inverter_tb.spice:

** sch_path: /home/openpdk/Projects/inverter/xschem/inverter_tb.sch

**.subckt inverter_tb in out

*.opin in

*.opin out

V1 in GND PWL(0 0 20n 0 900n 1.8)

.save i(v1)

V2 net1 GND 1.8

.save i(v2)

x1 net1 in out GND inverter

**** begin user architecture code

.lib /usr/local/share/pdk/sky130A/libs.tech/ngspice/sky130.lib.spice tt

.control

tran 1n 1u

plot V(in) V(out)

.endc

**** end user architecture code

**.ends

* expanding   symbol:  inverter.sym # of pins=4

** sym_path: /home/openpdk/Projects/inverter/xschem/inverter.sym

** sch_path: /home/openpdk/Projects/inverter/xschem/inverter.sch

.subckt inverter vdd in out vss

*.ipin in

*.opin out

*.iopin vss

*.iopin vdd

XM2 out in vdd vdd sky130_fd_pr__pfet_01v8 L=0.18 W=3 nf=3 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'

+ pd='2*int((nf+1)/2) * (W/nf + 0.29)' ps='2*int((nf+2)/2) * (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'

+ sa=0 sb=0 sd=0 mult=1 m=1

XM1 out in vss vss sky130_fd_pr__nfet_01v8 L=0.18 W=4.5 nf=3 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'

+ pd='2*int((nf+1)/2) * (W/nf + 0.29)' ps='2*int((nf+2)/2) * (W/nf + 0.29)' nrd='0.29 / W' nrs='0.29 / W'

+ sa=0 sb=0 sd=0 mult=1 m=1

.ends

.GLOBAL GND

.end

@Tiago Silva try removing all the parameters of pfet and nfet and rerun

In the xschem schematic?

Yes

If I remove all parameters I get a different error.

@Tim Edwards I'm also facing same error..can you please guide us.. Im searching for the solution from yesterday..

The output from ngspice looks like a really old version of nsgpice. You need at least

ngspice-36

.

@Tim Edwards I updated to ngspice37, yet the error still persists. However, it now notes

No compatibility mode selected!

The "no compatibility mode selected" message just means that you didn't copy the

.spiceinit

file from the PDK's

spinit

file; it will cause the simulation to take a lot longer, and might cause issues if you used fingered devices. What values of

W

,

L

, and

nf

are in the nFET instances?

The values specified in the lab. If I remember correctly, it was L=0.18, W=3, nf=3 for the pFET, and L=0.18, W=4.5, nf=3 for the nFET. I'll try to copy the .spiceinit file again in case I messed up before.

@Tiago Silva your netlist doesn't have a net called "in". Try plotting vin