rosbag 'UnicodeDecodeError'

edit

I have some rosbags. Most of them seem to be okay according to 'rosbag check <file>'. But a few of them cause the check to be aborted in the middle of the bag with the error below.

What is the best way to avoid this decoding error?

Traceback (most recent call last):
  File "/opt/ros/indigo/bin/rosbag", line 35, in <module>
    rosbag.rosbagmain()
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbag/rosbag_main.py", line 863, in rosbagmain
    cmds[cmd](argv[2:])
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbag/rosbag_main.py", line 452, in check_cmd
    migrations = checkbag(mm, args[0])
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbag/migration.py", line 76, in checkbag
    for topic, msg, t in bag.read_messages(raw=True):
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbag/bag.py", line 2331, in read_messages
    yield self.seek_and_read_message_data_record((entry.chunk_pos, entry.offset), raw)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbag/bag.py", line 2469, in seek_and_read_message_data_record
    msg_type = _get_message_type(connection_info)
  File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbag/bag.py", line 1565, in _get_message_type
    message_type = genpy.dynamic.generate_dynamic(info.datatype, info.msg_def)[info.datatype]
  File "/opt/ros/indigo/lib/python2.7/dist-packages/genpy/dynamic.py", line 168, in generate_dynamic
    tmp_file.file.write(full_text.encode())
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 2788: ordinal not in range(128)