agvs_sim kinetic joint_states not published

I have been trying to run agvs_sim tutorials in kinetic version .http://wiki.ros.org/agvs_sim/tutorials For the following command ``` roslaunch agvs_robot_control agvs_robot_control.launch ``` I am getting the following response. ``` AGVSControllerClass::starting ``` It is continous in loop. After investigating, ``` rostopic echo /agvs/joint_state ``` we found the following warning message ``` WARNING: no messages received and simulated time is active. Is /clock being published? ``` What would be the issue?