I am learning ROS 2. For this purpose, I am using Raspberry Pi 4B 8GB running Ubuntu 22.04 AArch64. With the execution of the example in Enabling topic statistics (C++), I could not obtain the expected result.

For example, the command ros2 topic echo /statistics gives me the following error:

pi@pi-desktop:~/ros2_ws$ ros2 topic echo /statistics
Unable to convert call argument to Python object (compile in debug mode for details)

Also note that the ros2 node list command only finds 2/3 expected nodes:

pi@pi-desktop:~/ros2_ws$ ros2 node list
/minimal_publisher
/minimal_subscriber_with_topic_statistics

the t_statistics node is missing. I ran the colcon build --packages-select cpp_pubsub compilation with the following command:

pi@pi-desktop:~/ros2_ws$ colcon build --packages-select cpp_pubsub --cmake-args -DCMAKE_BUILD_TYPE=Debug

But I don't know how to use it.