errors.md

All API methods use standard HTTP response codes to indicate success or failure.

Status Code	Reason
`200`	Success - with the result in the response content
`204`	Success - with no further content
`400`	Bad request - see response format below
`401`	Not authorized - see Authentication
`404`	Not found - a resource wasn't found
`409`	Version mismatch - see `POST /flows`
`500`	Server Error - something went wrong on the server

For a 400 response code, the body of the response will be a JSON object containing the fields:

Field	Description
`code`	The error code
`message`	The description of the error

{
  code: "module_already_loaded",
  message: "Module already loaded"
}

Code	Description
`unexpected_error`	An unexpected error occured
`invalid_request`	The request contains invalid parameters
`settings_unavailable`	The storage system does not support changing settings
`module_already_loaded`	The requested module is already loaded
`type_in_use`	The request is attempting to remove/disable a node type that is currently being used
`invalid_api_version`	The request specified an invalid api version in the `Node-RED-API-Version` header

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