"motion capture did not receive data" issue

[woolinjung]

I keep getting this issue when I run the "ros2 launch crazyflie launch.py" script which was in the crazyswarm2 tutorial.
We are using motion capture via Vicon and it is connected to it, but I keep getting the following error. We have configured Vicon with an object titled "cf1" and our crazflies.yaml includes "cf1" with the right radio address. Also, there is no data streaming in the "poses" topic. Thanks for the help in advance!

[Eric-Ewing]

There's two likely candidates:

1. This is most commonly an issue associated with the ip address or hostname in motion_capture.yaml. This should be the address of the vicon computer (ethernet preferred over wifi).
2. The mode in motion_capture.yaml is wrong (you want motionCapture, I believe, and you should make sure Tracker is in object tracking mode)

There's a couple other times when you'll see this message, like if you've accidentally paused tracker (space bar), but most commonly it's a config issue.
Crazyswarm1 has slightly more in depth descriptions of motion capture setup here and they mostly still apply to CS2.