commaai/openpilot · error · ValueError

Could not find segments for route {self.name.canonical_name}

Error message

Could not find segments for route {self.name.canonical_name} in data directory {data_dir}

What it means

Route.database_files()/local resolution scans a data directory for segment subdirectories matching the route name; if zero segments are found it raises ValueError naming the route and directory. The directory exists as a structure but contains nothing recognizable for that dongle|time.

Source

Thrown at openpilot/tools/lib/route.py:163

      try:
        dcamera_path = next(path for path, filename in files if filename in FileName.DCAMERA)
      except StopIteration:
        dcamera_path = None

      try:
        ecamera_path = next(path for path, filename in files if filename in FileName.ECAMERA)
      except StopIteration:
        ecamera_path = None

      try:
        qcamera_path = next(path for path, filename in files if filename in FileName.QCAMERA)
      except StopIteration:
        qcamera_path = None

      segments.append(Segment(segment, log_path, qlog_path, camera_path, dcamera_path, ecamera_path, qcamera_path))

    if len(segments) == 0:
      raise ValueError(f'Could not find segments for route {self.name.canonical_name} in data directory {data_dir}')
    return sorted(segments, key=lambda seg: seg.name.segment_num)


class Segment:
  def __init__(self, name, log_path, qlog_path, camera_path, dcamera_path, ecamera_path, qcamera_path):
    self._events = None
    self._name = SegmentName(name)
    self.log_path = log_path
    self.qlog_path = qlog_path
    self.camera_path = camera_path
    self.dcamera_path = dcamera_path
    self.ecamera_path = ecamera_path
    self.qcamera_path = qcamera_path

  @property
  def name(self):
    return self._name

View on GitHub (pinned to 516ec1e682)

Solutions

1. List the data dir and confirm folders look like '<dongle>|<time>--0' exactly matching your route string
2. Fix data_dir to the directory that directly contains those segment folders (not one level up/down)
3. Re-copy the route from the device preserving the directory layout

Example fix

# before
r = Route('b0c9d232|2022-01-01--00-00-00', data_dir='/data')

# after
# ensure /data/b0c9d232|2022-01-01--00-00-00--0/rlog.bz2 exists
import os
assert any('--' in d for d in os.listdir('/data')), 'no segment dirs found'
r = Route('b0c9d232|2022-01-01--00-00-00', data_dir='/data')

import os

def dir_has_segments(data_dir: str, route_name: str) -> bool:
    return any(d.startswith(route_name + '--') for d in os.listdir(data_dir))

try:
    r = Route(name, data_dir=data_dir)
except ValueError:
    raise SystemExit(f'{data_dir} has no segments for {name}; check layout')

When it happens

Trigger: Constructing Route(..., data_dir=...) where data_dir lacks '<dongle_id>|<time>--<seg>' folders — wrong dir, wrong route string, or the segment folders were renamed/moved.

Common situations: Pointing at an extracted-but-flattened dump; dongle ID or timestamp typo; data laid out for a different openpilot version's naming scheme.

Related errors

• Profile nickname must be 64 bytes or less
• Confirmation code required but not provided
• Invalid activation code format
• not a valid request or response
• -32000

AI-assisted analysis of commaai/openpilot@516ec1e682 (2026-08-15). Data as JSON: /api/errors/19054b6d687e01bc. Report an issue: GitHub.