openlane seems to be hanging on 1 violation, can I see somehwere which violation that is? start 54th optimization iteration ... completing 10% with 1 violations elapsed time = 000000, memory = 75.81 (MB) completing 20% with 1 violations elapsed time = 000000, memory = 82.00 (MB) completing 30% with 1 violations elapsed time = 000000, memory = 82.00 (MB) completing 40% with 1 violations elapsed time = 000000, memory = 82.00 (MB) completing 50% with 1 violations elapsed time = 000001, memory = 83.55 (MB) completing 60% with 1 violations elapsed time = 000001, memory = 83.67 (MB) completing 70% with 1 violations elapsed time = 000001, memory = 83.67 (MB) completing 80% with 1 violations

It is hard to say but I think it might be related to the floorplan. Some nets can't be routed. I also faced this problem and I changed the floorplan, and they went away.

Hieu Bui: If you have time to take a look at it: https://github.com/thesourcerer8/caravel_stdcelllib_stdcells_project/

You can use klayout to open the def file in runs/designs/tmp/routing or in results/routing. Sorry I can't run your project because mine still have some drc problem

Hmm, it seemed worse than it actually is, it just takes some time to complete.

That's good. By default, openlane will try to run maximum 64 iteration

at the end of routing it will write a report with the location of any remaining violations. You can look at it and see if you can spot a problem