Hi everybody, we use gazebo to simulate the kinect sensor. is there any option to run the opennitracker package without using the real sensor? when we try to run it: roslaunch opennilaunch openni.launch loaddriver:=false depthregistration:=true camera:=camera rosrun opennitracker opennitracker we have got the following error: InitFromXml failed: Can't create any node of the requested type!

thank you all in advance