Hi,
I'm using the rosbridge internal library to get load the message class for a given message type:
from rosbridge_library import ros_loader
...
self.msg_class = ros_loader.get_message_class(self.msg_type)
where self.msg_type is, for example, "rosgraph_msgs/Log".
This is generating the following error:
File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbridge_library/internal/ros_loader.py", line 88, in get_message_class
return _get_msg_class(typestring)
File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbridge_library/internal/ros_loader.py", line 128, in _get_msg_class
return _get_class(typestring, "msg", _loaded_msgs, _msgs_lock)
File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbridge_library/internal/ros_loader.py", line 163, in _get_class
cls = _load_class(modname, subname, classname)
File "/opt/ros/indigo/lib/python2.7/dist-packages/rosbridge_library/internal/ros_loader.py", line 187, in _load_class
raise InvalidPackageException(modname, exc)
InvalidPackageException: Unable to load the manifest for package rosgraph_msgs. Caused by: 'NoneType' object has no attribute 'strip'
>> failed with InvalidPackageException
This error is occurring on all message types, not just `rosgraph_msgs/Log`.
Any suggestions would be appreciated.
Thanks!
Simon
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