gazebo wg_world.launch doesn't show world

edit

Hi, I'm running ros fuerte on ubuntu 12.04 in a virtual machine.

I'm trying to run gazebo examples, in this case i want to run this tutorial "3D Willow Garage Map", but i get this error and an empty world. Somebody knows something about this?

gustavo@gustavo-VirtualBox:~$ roslaunch gazebo_worlds wg_world.launch
... logging to /home/gustavo/.ros/log/63666e4c-34e5-11e2-8956-08002725ede9/roslaunch-gustavo-VirtualBox-6173.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server 

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion
 * /use_sim_time
 * /wg_walls

NODES
  /
    gazebo (gazebo/debug)
    gazebo_gui (gazebo/gui)
    xml2factor_wg_walls (gazebo/spawn_model)

auto-starting new master
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[master]: started with pid [6189]
ROS_MASTER_URI=

setting /run_id to 63666e4c-34e5-11e2-8956-08002725ede9
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[rosout-1]: started with pid [6202]
started core service [/rosout]
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[gazebo-2]: started with pid [6216]
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[gazebo_gui-3]: started with pid [6222]
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:

Reading symbols from /opt/ros/fuerte/stacks/simulator_gazebo/gazebo/gazebo/bin/gzserver...(no debugging symbols found)...done.
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
Gazebo multi-robot simulator, version 1.0.2
Copyright (C) 2011 Nate Koenig, John Hsu, Andrew Howard, and contributors.
Released under the Apache 2 License.


Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[xml2factor_wg_walls-4]: started with pid [6234]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Msg Waiting for master.loading model xml from ros parameter
[INFO] [WallTime: 1353617060.820411] [0.000000] waiting for service /gazebo/spawn_gazebo_model
...[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
Gazebo multi-robot simulator, version 1.0.2
Copyright (C) 2011 Nate Koenig, John Hsu, Andrew Howard, and contributors.
Released under the Apache 2 License.


[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl for device]
[tcsetpgrp failed in terminal_inferior: Inappropriate ioctl ...