function EventStore.MonitoredServer.child_spec/1 is undefined or private

[sebastialonso]

I'm following the Conduit book, and I get this error.

(Mix) Could not start application eventstore: EventStore.Application.start(:normal, []) returned an error: an exception was raised: conduit_1 | (UndefinedFunctionError) function EventStore.MonitoredServer.child_spec/1 is undefined or private

My mix.exs

defmodule Conduit.Mixfile do
  use Mix.Project

  def project do
    [
      app: :conduit,
      version: "0.0.1",
      elixir: "~> 1.4",
      elixirc_paths: elixirc_paths(Mix.env),
      compilers: [:phoenix, :gettext] ++ Mix.compilers,
      start_permanent: Mix.env == :prod,
      aliases: aliases(),
      deps: deps()
    ]
  end

  # Configuration for the OTP application.
  #
  # Type `mix help compile.app` for more information.
  def application do
    [
      mod: {Conduit.Application, []},
      extra_applications: [:logger, :runtime_tools, :eventstore]
    ]
  end

  # Specifies which paths to compile per environment.
  defp elixirc_paths(:test), do: ["lib", "test/support"]
  defp elixirc_paths(_),     do: ["lib"]

  # Specifies your project dependencies.
  #
  # Type `mix help deps` for examples and options.
  defp deps do
    [ 
      {:commanded, "~> 0.16.0", override: true},
      {:commanded_eventstore_adapter, "~> 0.4.0"},
      {:eventstore, "~> 0.15.1"},
      {:phoenix, "~> 1.3.4"},
      {:phoenix_pubsub, "~> 1.0"},
      {:phoenix_ecto, "~> 3.2"},
      {:postgrex, ">= 0.0.0"},
      {:gettext, "~> 0.11"},
      {:cowboy, "~> 1.0"}
    ]
  end

  # Aliases are shortcuts or tasks specific to the current project.
  # For example, to create, migrate and run the seeds file at once:
  #
  #     $ mix ecto.setup
  #
  # See the documentation for `Mix` for more info on aliases.
  defp aliases do
    [
      "event_store.reset": ["event_store.drop", "event_store.create", "event_store.init"],
      "ecto.setup": ["ecto.create", "ecto.migrate", "run priv/repo/seeds.exs"],
      "ecto.reset": ["ecto.drop", "ecto.setup"],
      "test": ["ecto.create --quiet", "ecto.migrate", "test"]
    ]
  end
en

I can't find this error anywhere in the web. Any insights?

UDPDATE Comparing with this' repo mix.exs, I have removed the {:eventstore, "~> 0.15.1"}, dependency, and still the same error appears.

[sebastialonso]

SOLVED:

Check you elixir version in mix.exs. Upgraded to 1.6 and everything worked.

[slashdotdash]

Thanks for letting me know the solution to the problem @sebastialonso. I will update the code/book examples.