@User: Since it's just an inverter, the files will be small. . . can you please post the .sim file?

@Tim Edwards I wish I can copy paste it buubt it doesn't work for me so here is the snapshot for .sim file

Ah, that probably comes from Tim Ansell's name changes. The last time I ran full RCX extraction was when the device names were still things like "nshort" and "pshort", so taking the first letter resulted in the expected "n" and "p". When all devices start with "sky130_" all the devices now show up as "s" in the .sim file. I deal with different devices by cross-checking the positions marked in the .sim file against the layout, so all I need to do here is make sure that the .sim file gets the "n" and "p" and not "s". I will fix this and get back to you.

Many thanks..... 🙂

If you manually change "s" to "x" and then run "extresist", does it produce the same error, or is it okay with it?

Producing same error after changing it to x

Okay, thanks. That helps inform me what to do to solve the problem.

By the way the tapeout date is still Nov 30th, correct??

@Affan Abbasi: I just pushed an update to magic that fixes this problem with the .sim files. I did find that the SkyWater standard cells with the body terminal connections to the FETs on separate nets from the power and ground rails causes an issue (due to the lack of information about substrate connections in the .sim format), so the RCX netlist ends up with "error" substituted for all the body connections. This can probably be repaired by substitution into the resulting file; patching the error is probably not worth the effort since I intend to correct the problem the right way, as soon as I have the time to do it. Tapeout date is "end of November", specific date unspecified as far as I know, although November 30 is probably a good working target.