Hi Henry- if you were following the try it instructions after install, we forgot to add start roscore... So before doing the rosrun in the instructions in a separate terminal type roscore to start your ros master... Then things should work.. -Melonee On Sep 2, 2010, at 5:41 PM, Henry Acevedo wrote: > Hi I'm new with ROS ,as I want to test the NXT, I did the complete installation and as I'm using the Bluetooth dongle recommended by Lego with my laptop (Ubuntu) but I cannot connect I got an error > [ERROR] 2010-09-02 22:03:50,429: [Errno 111] Connection refused > Unable to register with master node [http://localhost:11311]: master may not be running yet. Will keep trying. > [INFO] 2010-09-02 22:04:52,563: signal_shutdown [signal-2] > [WARNING] 2010-09-02 22:04:52,565: cannot unregister with master due to network issues > [INFO] 2010-09-02 22:04:52,565: signal-2 > [INFO] 2010-09-02 22:04:52,674: connected to core topic /rosout > [ERROR] 2010-09-02 22:04:52,736: Unable to initialize /clock: [Errno 111] Connection refused > > > but not sure how to fix this issue, > > please any help will be appreciated > > > Thanks > > > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users