Thanks for your quick reply Brian.<div><br></div><div>slam_gmapping is crashing randomly, it can crash a few seconds or a few minutes after it started. Also I&#39;ve noticed that slam_gmapping crashing is causing the internet connection to crash as well.<br>


<div><br></div><div>I did what you suggested and this is what I got:</div><div><br></div><div>I did a launch file as instructed:</div><div><br></div><div><div>&lt;launch&gt;</div><div>  &lt;master auto=&quot;start&quot;/&gt;</div>

<div>  &lt;node pkg=&quot;gmapping&quot; type=&quot;slam_gmapping&quot; respawn=&quot;false&quot; name=&quot;slam_gmapping&quot; output=&quot;screen&quot; launch-prefix=&quot;xterm -e gdb --args&quot;&gt;</div><div>  &lt;/node&gt;</div>

<div>&lt;/launch&gt;</div></div><div><br></div><div>I open a roscore, set use_sim_time to true and then I launch slam_gmapping:</div><div><br></div><div>$ roslaunch slam_gmapping.launch</div><div><br></div><div>I get the gdb xterm window...</div>
<div>
<br></div><div>(gdb) set logging on</div><div>(gdb) run</div><div><br></div><div>Now I start my rosbag play....</div><div><br></div><div>The output in the gdb.txt file is:</div><div><br></div><div><div>Starting program: /home/blazz/ros/stacks/slam_gmapping/gmapping/bin/slam_gmapping &gt; gdb_output</div>

<div>[Thread debugging using libthread_db enabled]</div><div>[New Thread 0xb7fdcb70 (LWP 2249)]</div><div>[New Thread 0xb77dbb70 (LWP 2250)]</div><div>[New Thread 0xb6fdab70 (LWP 2251)]</div><div>[New Thread 0xb65ffb70 (LWP 2258)]</div>

<div>[New Thread 0xb5dfeb70 (LWP 2261)]</div><div>[New Thread 0xb55fdb70 (LWP 2304)]</div><div>[New Thread 0xb4dfcb70 (LWP 2305)]</div><div>[Thread 0xb4dfcb70 (LWP 2305) exited]</div><div>[Thread 0xb55fdb70 (LWP 2304) exited]</div>

<div>[Thread 0xb5dfeb70 (LWP 2261) exited]</div><div>[Thread 0xb65ffb70 (LWP 2258) exited]</div><div>[Thread 0xb6fdab70 (LWP 2251) exited]</div><div>[Thread 0xb77dbb70 (LWP 2250) exited]</div><div>[Thread 0xb7fdcb70 (LWP 2249) exited]</div>

<div><br></div><div>Program terminated with signal SIGKILL, Killed.</div><div>The program no longer exists.</div><div><br></div><div>The output doesn&#39;t give too much info... Does it help?</div><div><br></div><div>Gonçalo Cabrita</div>
<div>ISR - University of Coimbra</div><div>Portugal</div><br><div class="gmail_quote">
On Tue, Jul 27, 2010 at 4:40 PM, Brian Gerkey <span dir="ltr">&lt;<a href="mailto:gerkey@willowgarage.com" target="_blank">gerkey@willowgarage.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 Gonçalo,<br>
<br>
A shot in the dark: you might be exhausting available memory.  In any<br>
case, try running slam_gmapping in gdb to see what&#39;s causing it to die<br>
(<a href="http://www.ros.org/wiki/roslaunch/Tutorials/Roslaunch%20Nodes%20in%20Valgrind%20or%20GDB" target="_blank">http://www.ros.org/wiki/roslaunch/Tutorials/Roslaunch%20Nodes%20in%20Valgrind%20or%20GDB</a>).<br>
<br>
        brian.<br>
<br>
2010/7/27 Gonçalo Cabrita &lt;<a href="mailto:goncabrita@gmail.com" target="_blank">goncabrita@gmail.com</a>&gt;:<br>
<div><div></div><div>&gt; Hi everyone!<br>
&gt; I&#39;m trying to generate a map according to the tutorials and I&#39;ve ran into a<br>
&gt; bit of a problem. I&#39;m trying to run slam_gmapping on my MacBook Core2Duo<br>
&gt; running Ubuntu 10.04 with ROS and I&#39;m allways getting the same error,<br>
&gt; slam_gmapping crashes after a while after starting to run...<br>
&gt; ...<br>
&gt; *************RESAMPLE***************<br>
&gt; Deleting Nodes: 3 4 5 7 10 12 17 19 21 24 26 27 Done<br>
&gt; Deleting old particles...Done<br>
&gt; Copying Particles and  Registering  scans... Done<br>
&gt; update frame 422<br>
&gt; update ld=1.00063 ad=0.0320879<br>
&gt; Laser Pose= 5.26866 0.0983503 0.0260777<br>
&gt; m_count 4<br>
&gt; Average Scan Matching Score=110.945<br>
&gt; neff= 29.3825<br>
&gt; Registering Scans:Done<br>
&gt; /home/blazz/ros/ros/bin/rosrun: line 35:  1862 Killed<br>
&gt;  $exepath &quot;$@&quot;<br>
&gt; This is running on other machines in the lab but not in my Mac. I&#39;ve tried<br>
&gt; re-installing ROS but the problem persists.<br>
&gt; What additional information should I provide to help solve this problem???<br>
&gt; Thanks for your help,<br>
&gt; Gonçalo Cabrita<br>
&gt; ISR - University of Coimbra<br>
&gt; Portugal<br>
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</blockquote></div><br></div></div>