gazeboExam​pleStatefl​ow.slx example is running but not communicating with gazebo

I'm trying to go with example that has given Getting Started with Simulink and ROS. I have installed the VM ware and Running the interface ros_indigo_gazebo_v3. So I am getting the massege in the terminal of gazebo_turtlebo, Unable to connect to model database using [http://gazebosim.org/models//database.config]. Only locally installed models will be available. So is this the course for not communicating the simuling with gazebo?