Cheers

Hi, when i am using gazebo 1.9.2 with the pioneer2dx and the engine "bullet" i have the next warnings:

Warning [BulletHingeJoint.cc:230] bulletHinge does not exist, returning default angle Warning [BulletHingeJoint.cc:230] bulletHinge does not exist, returning default angle Warning [BulletHingeJoint.cc:383] bulletHinge does not exist, returning fake axis Warning [BulletHingeJoint.cc:383] bulletHinge does not exist, returning fake axis

And I can not move the pioneer2dx using the GazeboRosDiffDrive Plugin from ROS. What is the problem? Do i need to do an particular configuration?