... logging to /home/sherry/.ros/log/0dcd851c-5297-11e8-89c1-54e1adc3cb7e/roslaunch-sherry-12826.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/__init__.py", line 306, in main
    p.start()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/parent.py", line 268, in start
    self._start_infrastructure()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/parent.py", line 217, in _start_infrastructure
    self._load_config()
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/parent.py", line 132, in _load_config
    roslaunch_strs=self.roslaunch_strs, verbose=self.verbose)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/config.py", line 451, in load_config_default
    loader.load(f, config, verbose=verbose)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 748, in load
    self._load_launch(launch, ros_config, is_core=core, filename=filename, argv=argv, verbose=verbose)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 720, in _load_launch
    self._recurse_load(ros_config, launch.childNodes, self.root_context, None, is_core, verbose)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 656, in _recurse_load
    n = self._node_tag(tag, context, ros_config, default_machine, verbose=verbose)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 95, in call
    return f(*args, **kwds)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 407, in _node_tag
    self._param_tag(t, param_ns, ros_config, force_local=True, verbose=verbose)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 95, in call
    return f(*args, **kwds)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 256, in _param_tag
    vals = self.opt_attrs(tag, context, ('value', 'textfile', 'binfile', 'command'))
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 202, in opt_attrs
    return [self.resolve_args(tag_value(tag,a), context) for a in attrs]
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 183, in resolve_args
    return substitution_args.resolve_args(args, context=context.resolve_dict, resolve_anon=self.resolve_anon)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/substitution_args.py", line 370, in resolve_args
    resolved = _resolve_args(resolved, context, resolve_anon, commands)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/substitution_args.py", line 383, in _resolve_args
    resolved = commands[command](resolved, a, args, context)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/substitution_args.py", line 151, in _find
    source_path_to_packages=source_path_to_packages)
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/roslaunch/substitution_args.py", line 197, in _find_executable
    full_path = _get_executable_path(rp.get_path(args[0]), path)
  File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 203, in get_path
    raise ResourceNotFound(name, ros_paths=self._ros_paths)
ResourceNotFound: yolo
ROS path [0]=/opt/ros/kinetic/share/ros
ROS path [1]=/home/sherry/ros_slam/src/yolov3
ROS path [2]=/home/sherry/ros_slam/src/spencer_people_tracking/utils/video_to_bagfile
ROS path [3]=/home/sherry/ros_slam/src/yolov2
ROS path [4]=/home/sherry/ros_slam/install_isolated/share
ROS path [5]=/opt/ros/kinetic/share