Pricing
00
In productionProintermediateService wiring

The service exists but the call is rejected

Align the service types so the call is accepted.

Pairs with Services: request and response in Learn ROS 2 from the basics. Read the concept first, then diagnose it here.

Unlock this lab with Pro

Operator report

The client finds the service but the call fails with a type error.

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

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01client type→
  2. 02type match→
  3. 03server typeOUT
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
  • Types match
  • The call returns
  • Hidden regression behavior
  • Root cause explanation