Michal,
Is this a message you see once at startup, or is your listener spewing
lots of these messages?
A good tool to debug this problem is the tf_monitor: "rosrun tf
tf_monitor map base_link"
Wim
On Thu, Jun 24, 2010 at 2:53 AM, <
Michal.Stolba@cis.strath.ac.uk> wrote:
>
>
> Hi all,
>
> I'm trying to follow the tutorial on transform listener:
>
> http://www.ros.org/wiki/tf/Tutorials/Writing%20a%20tf%20listener%20(C%2B%2B)
>
> I'm trying to use it with simulated pr2 and gmapping to determine location
> of the robot relative to the map. What I'm getting is following message:
>
> [ERROR] 4546.007000467: Could not find a connection between '/map' and
> '/base_footprint' because they are not part of the same tree.Tf has two or
> more unconnected trees. When trying to transform between /map and
> /base_footprint.
>
> although, rviz shows the transforms and connections just fine, tf_echo
> outputs the transforms as well and tf_view prints out just one tree
> (attached).
>
> Any hints on what might be the problem would be very appreciated.
>
> Michal
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>
>
--
--
Wim Meeussen
Willow Garage Inc.
<
http://www.willowgarage.com)
(text/plain)