Hi Stuart, Tully, The problem is exactly what you have suspected. Now I'm using ntpd in all the machines to get their system clock synchronized. Thanks a lot... -- View this message in context: http://ros-users.122217.n3.nabble.com/For-frame-swissranger-link-No-transform-to-fixed-frame-odom-tp2431866p2437760.html Sent from the ROS-Users mailing list archive at Nabble.com.