hi, i'm getting parasitic extraction error with R. This is iic-tool https://github.com/iic-jku/iic-osic-tools i just updated. With the May updated version of iic-tool, there are no errors related to resistor extraction. Advance thanks.

Uff, that might be difficult to debug. @Tim Edwards Any idea what could have changed in

magic

or `open_pdks`` in that time period? Can you please check the extract script above, is this the right way to do things?

@Tài Trần Tấn: It doesn't look like an issue with the extraction per se; it looks like the pin

RO

is not connected to anything in the layout. Also, the netlist does not look like an R-C extracted netlist. It's possible that none of the nets in this small layout exceeded the threshold for extracting resistance, but I find that very unlikely. Your netlist and your script do not match: The netlist is

RO.spice

and the script is extracting

Inverter.spice

. If you can't figure it out, please post the layout.

Currently I am instructing my friends to use sky130. I'm instructing you four. There are 2 people who installed the program in May like me and 2 people who just installed iic-tool last Saturday. The two people who installed the tool in May still extracted the parasitic resistance normally. However, with the same method, the two people who installed the tool recently could not extract the parasitic resistance.

The output you show above is not consistent with the script you showed earlier. If there is a valid

.res.ext

file and the script uses

ext2spice extresist on

before calling

ext2spice

, then the output netlist will have resistors in it.

That's the problem I'm having, I've got the .res.ext file but the output netlist doesn't exist in it.

What is an mkv file? Can you provide a zipped directory or gzipped tarball?

mkv is a video. @Tài Trần Tấn Most helpful usually is to provide a testcase here that people can replicate, means all the files you are using and a description of the steps you do. With this @Tim Edwards is usually super quick in identifying the

magic

issue (if there is one).

Here is how I do parasitic resistance extraction.

@Tài Trần Tấn I quickly tested your design with the

2023.09

release of IIC-OSIC-TOOLS. DRC and LVS are passing, and I extracted a RC-netlist using

iic-pex.sh

, which I post here. On quick inspection it looks quite ok, please check more careful if correct.

Thank you so much!!!