Hello,<div>    I am using cturtle from the Ubuntu Lucid repositories, with the svn version of the nxt stack. I am running Ubuntu Lucid x64 with kernel 2.6.32-generic. I have an NXT controller, and I am trying to use it with ROS. I have an ultrasonic sensor configured for use on the robot. When I run nxt_ros with bluetooth, I get the error &quot;nxt.error.I2CError: ls_get_status timeout&quot; when it is setting up the sensors, and nxt_ros dies. When I use USB, I get the error &quot;usb.USBError: No error&quot; and nxt_ros dies. What can I do to fix this? If I comment out the ultrasonic sensor from the yaml file (and just leave two motors and a gyro), the process runs just fine.</div>


<div>From,</div><div>   Max</div>