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

sabrinakliegl at innok.de sabrinakliegl at innok.de
Fri Apr 16 09:51:53 UTC 2010

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
[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,

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