Thanks for your quick reply Brian.

slam_gmapping is crashing randomly, it can crash a few seconds or a few
minutes after it started. Also I've noticed that slam_gmapping crashing is
causing the internet connection to crash as well.

I did what you suggested and this is what I got:

I did a launch file as instructed:

<launch>
  <master auto="start"/>
  <node pkg="gmapping" type="slam_gmapping" respawn="false"
name="slam_gmapping" output="screen" launch-prefix="xterm -e gdb --args">
  </node>
</launch>

I open a roscore, set use_sim_time to true and then I launch slam_gmapping:

$ roslaunch slam_gmapping.launch

I get the gdb xterm window...

(gdb) set logging on
(gdb) run

Now I start my rosbag play....

The output in the gdb.txt file is:

Starting program:
/home/blazz/ros/stacks/slam_gmapping/gmapping/bin/slam_gmapping > gdb_output
[Thread debugging using libthread_db enabled]
[New Thread 0xb7fdcb70 (LWP 2249)]
[New Thread 0xb77dbb70 (LWP 2250)]
[New Thread 0xb6fdab70 (LWP 2251)]
[New Thread 0xb65ffb70 (LWP 2258)]
[New Thread 0xb5dfeb70 (LWP 2261)]
[New Thread 0xb55fdb70 (LWP 2304)]
[New Thread 0xb4dfcb70 (LWP 2305)]
[Thread 0xb4dfcb70 (LWP 2305) exited]
[Thread 0xb55fdb70 (LWP 2304) exited]
[Thread 0xb5dfeb70 (LWP 2261) exited]
[Thread 0xb65ffb70 (LWP 2258) exited]
[Thread 0xb6fdab70 (LWP 2251) exited]
[Thread 0xb77dbb70 (LWP 2250) exited]
[Thread 0xb7fdcb70 (LWP 2249) exited]

Program terminated with signal SIGKILL, Killed.
The program no longer exists.

The output doesn't give too much info... Does it help?

Gonçalo Cabrita
ISR - University of Coimbra
Portugal

On Tue, Jul 27, 2010 at 4:40 PM, Brian Gerkey <gerkey@willowgarage.com>wrote:

> hi Gonçalo,
>
> A shot in the dark: you might be exhausting available memory.  In any
> case, try running slam_gmapping in gdb to see what's causing it to die
> (
> http://www.ros.org/wiki/roslaunch/Tutorials/Roslaunch%20Nodes%20in%20Valgrind%20or%20GDB
> ).
>
>        brian.
>
> 2010/7/27 Gonçalo Cabrita <goncabrita@gmail.com>:
> > Hi everyone!
> > I'm trying to generate a map according to the tutorials and I've ran into
> a
> > bit of a problem. I'm trying to run slam_gmapping on my MacBook Core2Duo
> > running Ubuntu 10.04 with ROS and I'm allways getting the same error,
> > slam_gmapping crashes after a while after starting to run...
> > ...
> > *************RESAMPLE***************
> > Deleting Nodes: 3 4 5 7 10 12 17 19 21 24 26 27 Done
> > Deleting old particles...Done
> > Copying Particles and  Registering  scans... Done
> > update frame 422
> > update ld=1.00063 ad=0.0320879
> > Laser Pose= 5.26866 0.0983503 0.0260777
> > m_count 4
> > Average Scan Matching Score=110.945
> > neff= 29.3825
> > Registering Scans:Done
> > /home/blazz/ros/ros/bin/rosrun: line 35:  1862 Killed
> >  $exepath "$@"
> > This is running on other machines in the lab but not in my Mac. I've
> tried
> > re-installing ROS but the problem persists.
> > What additional information should I provide to help solve this
> problem???
> > Thanks for your help,
> > Gonçalo Cabrita
> > ISR - University of Coimbra
> > Portugal
> > _______________________________________________
> > ros-users mailing list
> > ros-users@code.ros.org
> > https://code.ros.org/mailman/listinfo/ros-users
> >
> >
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