ROS tutorials were also down for a few days and the quaternion tutorial vanished. I'm guessing it is the newest and wasn't backed up like the rest. [http://wiki.ros.org/ROS/Tutorials](http://wiki.ros.org/ROS/Tutorials) --- [Visit Topic](https://discourse.ros.org/t/when-can-we-use-ros-answer/3428/6) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: