[ros-users] Fail to locate robot on nav_view with the launc…

HI everybody,

I'm trying to run the launch/move_base_multi_robot.launch example launch
file, it simulates two robots on different windows. But when the windows of
nav_view opens I don't see anything but the map (image 1). Neither the
inflated obstacles nor the particle cloud or the robot footprint seem to
appear. I also looked for information in what was being published over those
topics but there weren't any messages. I also receive a warning message when
I run the launch file but I don't know if it has anything to do with it
(Image 2):

[ WARN] [1285694547.646811796, 3.800000000]: The base_scan observation
buffer has not been updated for 2.10 seconds, and it should be updated every
0.40 seconds.

This problem occurs also with the move_base_fake_localization_
10cm.launch example, but in this case it opens a window from stage
(Stage-3.2.2) and from there I can see the footprint of the robot (image 3).
Also when I listen to the /odom topic (rostopic echo /odom) It prints the
following (image 4):

wist:
  twist:
    linear:
      x: 0.0
      y: 0.0
      z: 0.0
    angular:
      x: 0.0
      y: 0.0
      z: 0.0
  covariance: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]

Could you please tell me the possible reason of why I cant see the
footprints of the robot or anything else besides the map on the nav_view
window?

The Version of Ubuntu I use is 10.4
The Version of ROS is CTurtle.
The Version of Stage is 3.2.2.

Image 1:
http://2.bp.blogspot.com/_ZcT6CZOJoq4/TKJgFCA9SAI/AAAAAAAAARU/3fuLlfe6LDk/s1600/Image+1.png
Image 2:
http://4.bp.blogspot.com/_ZcT6CZOJoq4/TKJggXVCY9I/AAAAAAAAARk/Fy3qHiQS1r0/s1600/Image+2.png
Image 3:
http://1.bp.blogspot.com/_ZcT6CZOJoq4/TKJguOTQtGI/AAAAAAAAARs/z2F_K26u9WI/s1600/Image+3.png
Image 4:
http://4.bp.blogspot.com/_ZcT6CZOJoq4/TKJg6Fy7bbI/AAAAAAAAAR0/yncoRZCZK2g/s1600/Image+4.png

--
Oscar Rodrigo Hernández Panczenko IMT ITEM-CEM