Pricing
00
In productionProbeginnerLaunch composition

A node is missing after launch

Make the launch file start every required node.

Pairs with Launch files and composition in Learn ROS 2 from the basics. Read the concept first, then diagnose it here.

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Operator report

After launch, `robot_state_publisher` is absent from `ros2 node list`.

Ubuntu 24.04, ROS 2 Jazzy, rclpy, a single-package browser workspace

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01build nodes→
  2. 02add to description→
  3. 03launch starts nodesOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • All required nodes start
  • No extra node is added
  • Hidden regression behavior
  • Root cause explanation