I have seen this before when the /use_sim_time parameter was set.

Does "rostopic hz /scan" show you that messages are flowing?

On Tue, Oct 26, 2010 at 2:55 AM, enddl22 <enddl22@gmail.com> wrote:
>
> Hi, all
>
> I'm trying to record certain topic(/scan) from the /hokuyo_node.
>
> I runned "rosbag record /scan" command while /scan topic is publishing.
>
> But rosbag recorder always attached to /clock topic and couldn't create
> beautiful bag file.
>
> Is anyone who knows how to solve this?
>
> Thanks.
>
> http://ros-users.122217.n3.nabble.com/file/n1772711/Screenshot-2.png
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