Hello Nitin and Hai,

The periodic snapshotter was failing due to a change in cturtle in how nodes
decide whether to use simulation time or not. (
http://www.ros.org/wiki/cturtle#ROS_1.2).  In order for the periodic
snapshotter to work, you have to enable simulation time before starting the
snapshotter:

*> rosparam set /use_sim_time "True"*

Thank you for pointing out this problem.  I've updated the tutorial
accordingly.

Vijay

On Tue, Aug 3, 2010 at 12:47 PM, Hai Nguyen <haidai@gmail.com> wrote:

> Hi Nitin,
>
> The TF_OLD data message, as Tully pointed out, was due to tf not being
> robust to time skips the workaround is to restart the complaining
> node. periodic_snapshotter doesn't really work with the provided bag
> file, however, the pr2_laser_snapshotter will work fine if you record
> a topic of the type pr2_msgs/LaserScannerSignal.
>
> -Hai
>
> On Tue, Aug 3, 2010 at 6:55 AM, nitinDhiman <nitinkdhiman@gmail.com>
> wrote:
> >
> > Hi Hai and Tully,
> >
> > I am also facing same problem. Did you got solution to this?
> >
> > thanks & rgds
> > nitin
> > --
> > View this message in context:
> http://ros-users.122217.n3.nabble.com/TF-OLD-data-error-while-using-scan-assembler-on-bag-files-tp1000432p1018731.html
> > Sent from the ROS-Users mailing list archive at Nabble.com.
> >
> >
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> Hai Nguyen
> CS, Robotics
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