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How to check a workstation for viewer and driver problems before a robot session with Dalaran

Run the built-in doctor command to find setup problems in plain language.

Who it is forA robotics operator who must start a viewer session on a new or changed machine and needs to know it will work.

The problemGraphics drivers, environment variables, or a broken Python install can stop the viewer just before a test run.

The outcomeA plain-language report of build info, graphics adapters, DALARAN_* variables, and recording integrity.

What you need first

  • Python with pip, or Rust with cargo, to install the Dalaran SDK or viewer
  • A terminal to run the dalaran command
  • An existing .rrd, .dlr, or MCAP recording, or a ROS 2 setup with rosbag2 files, for the replay use cases

Steps

  1. Run cargo install dalaran-cli --locked to install the viewer binary on its own.
  2. Run dalaran --help to confirm the binary is on your path.
  3. Run dalaran doctor and read the report for graphics adapter, driver, and environment problems.
  4. Fix each reported issue, then run dalaran --serve to confirm the web viewer starts.

Prompt for your agent

In the Flaminis/Dalaran repository, install the dalaran-cli binary and run dalaran doctor on this machine. Expected output is a list of findings about build info, graphics adapters, and environment variables. Verify that the report names no failing item before the robot session starts.

Caveat. The README says doctor lives in the viewer binary, so it only helps once cargo install has succeeded; the Python-side check is dalaran-doctor.

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