This what i am getting when considering wheels as rotating wall , can someone please tell me what am i doing wrong and how can i rotate wheels . Will rotating walls will do or we will have to consider wheels as rotating zone and if rotating zone is to be considered how to do it because when i tried doing it simulation didn't even initiate and 3ds solver stopped .

Also i wanted to know about which axis are the wheels rotating is it about the robots VY axis or the rotating arrow in the right and what will i have to do to move the arrow , to wheels position .

Edu