cflib bug with upload multiple trajectories

[ywang760]

Hi, I have a question on using cf.uploadTrajectory to upload multiple trajectories. For example, I'm changing this to

for cf in allcfs.crazyflies:
            cf.uploadTrajectory(0, 0, traj)
            cf.uploadTrajectory(1, 0, traj1)

I'm getting

[crazyflie_server.py-4]   File "/home/yutongw/ros2_ws/install/crazyflie/lib/crazyflie/crazyflie_server.py", line 990, in _upload_trajectory_callback
[crazyflie_server.py-4]     trajectory_mem = self.swarm._cfs[uri].cf.mem.get_mems(
[crazyflie_server.py-4] IndexError: tuple index out of range

on the server.

[knmcguire]

hmmm that is interesting, perhaps that is a bug on the cflib backend side.

Does this work for the cpp backend? If you start the server with backend:=cpp ?

[knmcguire]

There was a bug indeed, but luckily easy to spot the issue. There is a PR here #549, if you can try it out?

[ywang760]

Thank you. It works with backend:=cpp. Adding in #549 also makes backend:=cflib works.

[knmcguire]

Great! The fix has been merged so you can pull the latest changes on your machine.