Thanks for your reply, please see below On Mon, Dec 20, 2010 at 3:56 AM, Ken Conley wrote: > On Sun, Dec 19, 2010 at 2:05 AM, K Chen wrote: > > Hi all: > > I am new to ROS and still going through the tutorial, when I used > > rxconsole and rxloggerlevel and did not close them until after I launched > > the "mimic turtles", I used Ctrl C to end them respectively, but when I > turn > > to rxgraph window to see available node graph, they are still there with > > error "Cannot communicate with ...". I tried rosnode kill and it > displayed > > "killed", but when using rosnode list to see present nodes, they are > still > > there, so does the rxgraph windows shows. > > It sounds like they were killed, but didn't die cleanly. There > shouldn't be any effect on your system other than they show up in > rxgraph. > Yes, but I can also see them using command "rosnode list". I don't know how this command works, but I guess this info should come from Master Node, so doesn't it has any mechanism to "kick out" inactive nodes out of ROS network? > > > So I am asking whether this is normal that they cannot be killed, > and > > this won't cause anything unexpected ? > > This sounds like a bug in rxconsole and rxloggerlevel. They should > die cleanly on Ctrl-C. > > - Ken > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users > -- Regards University of Science and Technology of China School of Computer Science and Technology K.Chen