Following the instructions here on running cardano-node: https://developers.cardano.org/docs/get-started/running-cardano

I'm running into an error on startup that looks like this: InvalidYaml (Just (YamlException "Yaml file not found: /path/to/testnet/testnet-config.json"))

Do the configuration files have to be Yaml formatted?

1 Answer 1


JSON is a proper subset of YAML, so JSON is okay. Are you using the standard testnet config downloaded from here? It is best to wget it.

  • 1
    My stupid mistake, I didn't check the json files and they're improperly formatted. Thank you!
    – nciao
    Aug 31, 2021 at 1:27

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