open-source-silicon.dev

This is probably a long shot, but was anyone here involved in the calibration of openRCX with the skywater PDK? I've been trying to follow the flow described here (<https://github.com/The-OpenROAD-Project/OpenRCX/blob/master/doc/calibration.txt>) to generate the openRCX extraction rules, but OpenROAD is segfaulting on the bench_read_spef command. Are there any part of the SPEF standard that aren't supported by openRCX that might be causing the issue, or any other things I could do make this work?

Trying the RCX flow even on skywater doesn't seem to work. Using the openRCX rules file <https://github.com/The-OpenROAD-Project/OpenROAD/blob/929c72813c45c5aeccf341ad33ddb9338b613b53/src/rcx/example/sky130/patterns.rules|provided by skywater> errors in a different way; trying to get the parasitics for a design using the command:

```extract_parasitics -ext_model_file patterns.rules -cc_model 12 -max_res 0 -context_depth 10 -coupling_threshold 0.1x```
results in
```[ERROR RCX-0487] No RC model read from the extraction model! Ensure the right extRules file is used!```
That command is just taken from the RCX demo scripts <https://github.com/The-OpenROAD-Project/OpenRCX/blob/master/calibration/script/ext_patterns.tcl|here.>
Am I using the rules file incorrectly or is the rules file not up to date with the rest of the PDK/latest openRCX/latest OpenROAD

<@U02HMQB9HS6> Did you ever find a solution? I'm running into the same issue.