I'm trying to bisect a bug and running command:

python bisect_builds.py -g 597469 -b 597692 --verify-range -a win64 -o

I get error:

Total of 0 percent of perf builds available in the range
Traceback (most recent call last):
  File "bisect_builds.py", line 1684, in <module>
    sys.exit(main())
  File "bisect_builds.py", line 1640, in main
    evaluator, opts.verify_range)
  File "bisect_builds.py", line 1044, in Bisect
    raise RuntimeError(msg)
RuntimeError: We don't have enough builds to bisect. revlist: []

Are there no builds available for these revisions?