Likely you're running an older roscore with a newer rostopic.

Josh

On Tue, May 18, 2010 at 7:34 PM, Sai Prashanth <iluvmylife@gmail.com> wrote:

> Hi,
>
> I'm running ros latest on the PR2 (ros core version 9752). I run into the
> following error when I try to do a rostopic list:
>
> saip@pr1000:~/ros_sandbox/versioned_latest/ros$ rostopic list
> Traceback (most recent call last):
>   File "/u/saip/ros_sandbox/versioned_latest/ros/bin/rostopic", line 47, in
> <module>
>     rostopic.rostopicmain()
>   File
> "/u/saip/ros_sandbox/versioned_latest/ros/tools/rostopic/src/rostopic.py",
> line 1339, in rostopicmain
>     _rostopic_cmd_list(argv)
>   File
> "/u/saip/ros_sandbox/versioned_latest/ros/tools/rostopic/src/rostopic.py",
> line 1281, in _rostopic_cmd_list
>     exitval = _rostopic_list(topic, verbose=options.verbose,
> subscribers_only=options.subscribers, publishers_only=options.publishers) or
> 0
>   File
> "/u/saip/ros_sandbox/versioned_latest/ros/tools/rostopic/src/rostopic.py",
> line 736, in _rostopic_list
>     topic_types = _succeed(master.getTopicTypes('/rostopic'))
>   File "/usr/lib/python2.6/xmlrpclib.py", line 1199, in __call__
>     return self.__send(self.__name, args)
>   File "/usr/lib/python2.6/xmlrpclib.py", line 1489, in __request
>     verbose=self.__verbose
>   File "/usr/lib/python2.6/xmlrpclib.py", line 1253, in request
>     return self._parse_response(h.getfile(), sock)
>   File "/usr/lib/python2.6/xmlrpclib.py", line 1392, in _parse_response
>     return u.close()
>   File "/usr/lib/python2.6/xmlrpclib.py", line 838, in close
>     raise Fault(**self._stack[0])
> xmlrpclib.Fault: <Fault 1: '<type \'exceptions.Exception\'>:method
> "getTopicTypes" is not supported'>
>
> I haven't really looked into what is causing this. Any pointers ?
>
> Thanks,
> Sai
>
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