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2012-10-27 05:09:37 -0500 asked a question why roslaunch the gazebo failed.
  1. sudo apt-get install ros-fuerte-simulator-gazebo
  2. source /opt/ros/fuerte/setup.bash
  3. roslaunch gazebo_worlds empty_world.launch

Connected to gazebo master @ http://localhost:11345 Error [] Unable to get topic namespaces in [50] tries. Error [] No namespace found

It happens every time.Ever succeeded one time. How can I do,i can't make progress any more!

I had succeeded to study and execute 1-16 steps with the tutorials. One time after just opening computer, I roslaunched gazebo_worlds in success and appeared the GUI window,but then several minutes later it happened "No namespace found" again and GUI Windown disappeared. I did nothing at that time and the GUI was to my surprise!