[ros-users] "could not find common time"-problem with tf

Tully Foote tfoote at willowgarage.com
Fri Apr 16 21:38:18 UTC 2010

Hi Sabrina,
Could you check some of the debugging outputs from tf.  There are debugging
methods here:  http://www.ros.org/wiki/tf/Debugging%20tools  Of particular
interest is the output of view_frames.

Also, are you running in simulation?  If so do you have /using_sim_time set
to true?  This can cause a race condition at startup and cause the "no
common time" error.  See documentation here http://www.ros.org/wiki/Clock


On Fri, Apr 16, 2010 at 2:51 AM, <sabrinakliegl at innok.de> wrote:

> Hi everybody,
> I get a strange error when I try to do a transformPose:
> [ERROR] ... Could not find a common time /base_link and /map
> and
> [ERROR] ... Could not find a connection between /base_link and /map
> because they are not part of the same tree.
> But when I start tf_echo /base_link /map there is a proper transformation.
> The error occurred suddenly when I started a launch-file which did
> work without any problem at the last startup.
> 'rosrun tf reset_time.py' solves the problem for a short time, but
> after some successful calls of "transformPose" the error is back again.
> Any ideas?
> Greetings from the RoboCup German Open in Magdeburg,
> Sabrina
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users

Tully Foote
Systems Engineer
Willow Garage, Inc.
tfoote at willowgarage.com
(650) 475-2827
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