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Gazebo_Ros_Pkgs for hydro error with gazebo 1.9.0

I am following the directions at:

I built the ros hydro package and integrated it with gazebo 1.9.0 however when i run the commands in separate terminal widows:

roscore &
rosrun gazebo_ros gazebo

I recieve the following error at the command line and no gazebo window:

Gazebo multi-robot simulator, version 1.9.0
Copyright (C) 2013 Open Source Robotics Foundation.
Released under the Apache 2 License.

Msg Waiting for master.Warning [] No <sdf> element in file[/home/dev/ros_catkin_ws/install_isolated/lib/]
Error [] Unable to load file[/home/dev/ros_catkin_ws/install_isolated/lib/].
Warning [] No <sdf> element in file[urdf file]
Error [] parse as old deprecated model file failed.
Error [] Unable to read sdf file[/home/dev/ros_catkin_ws/install_isolated/lib/]
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::lock_error> >'
  what():  boost::lock_error
Error [] Failed to connect to master in 30 seconds.
/home/dev/code/catkin_workspace/src/gazebo_ros_pkgs/gazebo_ros/scripts/gazebo: 25: kill: invalid signal number or name: SIGINT

Any ideas on how to solve this issue? gazebo will run fine alone if just typing gazebo in the terminal. However as run in the above, it produces an error.