I am having trouble running the Using a URDF In Gazebo Tutorial. I downloaded and create the package correctly and sourced correctly but I still get an error. When I run roslaunch rrbotdescription rrbotrviz.launch it works but running roslaunch rrbotgazebo rrbotworld.launch does not. Gazebo pops up but is a black screen.

The error I get is:

[INFO] [WallTime: 1405533303.796678] [0.000000] Calling service /gazebo/spawnurdfmodel Segmentation fault (core dumped) Service call failed: transport error completing service call: unable to receive data from sender, check sender's logs for details [gazebo-2] process has died [pid 10533, exit code 139, cmd /opt/ros/hydro/lib/gazeboros/gzserver /home/johnlin/catkinws/src/gazeborosdemos/rrbotgazebo/worlds/rrbot.world _name:=gazebo _log:=/home/johnlin/.ros/log/4ebe8496-0d12-11e4-ade3-001aa0b2acc7/gazebo-2.log]. log file: /home/johnlin/.ros/log/4ebe8496-0d12-11e4-ade3-001aa0b2acc7/gazebo-2*.log [urdfspawner-4] process has finished cleanly log file: /home/johnlin/.ros/log/4ebe8496-0d12-11e4-ade3-001aa0b2acc7/urdf_spawner-4*.log

I have Gazebo 2.2 and ROS Hydro. I need to get this to work in order to move on to the next tutorial and learn ros_control.