Eunchul Jeon,<div><br></div><div>It seems likely that something is wrong in your tf tree when trying to transform points from the laser frame to the odometric frame. Can you use a tool like view_frames or tf_echo to find out what your tree looks like? In particular you should be able to run tf_echo laser odom successfully before expecting gmapping to work.</div>
<div><br></div><div>Hope this helps,</div><div><br></div><div>Eitan<br><br><div class="gmail_quote">On Thu, Nov 18, 2010 at 5:01 AM, eunchul Jeon <span dir="ltr">&lt;<a href="mailto:jsharp83@gmail.com">jsharp83@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi, I&#39;m Eunchul Jeon, <br><br>I saw following warning when I run the rosrun gmapping slam_gmapping scan:=base_scan<br>
<br>[ WARN] [1290084259.016741027]: Message from [/hokuyo_node] has a non-fully-qualified frame_id [laser]. Resolved locally to [/laser].  This is will likely not work in multi-robot systems.  This message will only print once.<br>

[ WARN] [1290084273.997493021]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information.<br><br>and I ran the roswtf command, and saw following warning<br>

<br>WARNING The following node subscriptions are unconnected:<br> * /rviz_1290083985383805192:<br>   * /scan<br>   * /reset_time<br> * /slam_gmapping:<br>   * /reset_time<br> * /LaserListener:<br>   * /base_scan1<br><br>
Maybe I need to connect reset_time node but I can&#39;t find any information about that.<br>
<br>Thank you in advance your help.<br clear="all"><br>-- <br>================================================<br>Eunchul Jeon<br><br>M.S. Student, Intelligent Systems and Neurobotics lab,<br>Dept. Computer Science, KAIST<br>

Science town, Daejeon, 305-701, South Korea<br>TEL: 82 42 350 3580<br>E-mail: <a href="mailto:jsharp@kaist.ac.kr" target="_blank">jsharp@kaist.ac.kr</a>, <a href="mailto:jsharp83@gmail.com" target="_blank">jsharp83@gmail.com</a><br>
Homepage: <a href="http://isnl.kaist.ac.kr" target="_blank">http://isnl.kaist.ac.kr</a><br>
================================================<br>
<br>_______________________________________________<br>
ros-users mailing list<br>
<a href="mailto:ros-users@code.ros.org">ros-users@code.ros.org</a><br>
<a href="https://code.ros.org/mailman/listinfo/ros-users" target="_blank">https://code.ros.org/mailman/listinfo/ros-users</a><br>
<br></blockquote></div><br></div>