Hi there

When I load and run the youbot model in V-REP it crashes. Here is the error

Initialization successful.

publisher callback

arg 0: arm_controller

publisher callback

arg 0: gripper_controller

publisher callback

arg 0: /cmd_vel

init

publisher callback

arg 0: /clock

publisher callback

arg 0: /kinect

arg 4: /kinect_depthSensor

publisher callback

arg 0: /scan_front

arg 2: scan_front_scan

arg 4: /base_laser_front_link

[FATAL] [1461892299.029723739]: ASSERTION FAILED

    file = /opt/ros/indigo/include/ros/publisher.h

    line = 102

    cond = false

    message = 

[FATAL] [1461892299.029925493]: Call to publish() on an invalid Publisher

[FATAL] [1461892299.029972311]: 

Trace/breakpoint trap (core dumped)

I will be thankful if you can help me. Thanks.