[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.661000 according to authority Authority undetectable [ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained [ekf_node-9] at line 292 in ./src/buffer_core.cpp

[WingsofFAN]

Please provide the following information:

• OS: (Ubuntu 22.04)
• ROS 2 Distro: ( Humble)
• installed: apt
• Package version: (ros-humble-clearpath-simulator)

When I follow the tutorials to run the demo,the car can not move, and having the warning:

...
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.241000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.262000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.280000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.301000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.322000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.340000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.361000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.382000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.400000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.421000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.442000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.460000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.481000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.502000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.520000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.541000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.562000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.580000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.601000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.622000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.640000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.661000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.682000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.700000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.721000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.742000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.760000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.781000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.802000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.820000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.841000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.862000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.880000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.901000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.922000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained
[ekf_node-9]          at line 292 in ./src/buffer_core.cpp
[ekf_node-9] Warning: TF_OLD_DATA ignoring data from the past for frame base_link at time 23.940000 according to authority Authority undetectable
[ekf_node-9] Possible reasons are listed at http://wiki.ros.org/tf/Errors%20explained

What cause the waring? And how can I do run the demo completely.

[hilary-luo]

Unfortunately this isn't enough information for us to fully understand your situation.

Please provide:

• the version numbers of the packages that you are running (simulator, config, and common most importantly)
• the robot.yaml that you are using
• the full command(s) that you launched
• and the full output is from running that command (from the start until the beginning of the repeated message) - if you are running more than one command in different terminals then please provide the output from each.