title: Elixir: There is no process currently associated with the given name
body: <p>Elixir gives me an error that says that there is something to do with the process names, however, I don't know how I could fix it.</p>
  
  <p>My <code>mix.exs</code> file is as follows:</p>
  
  <pre class="lang-ex prettyprint-override"><code>defmodule Crowller.MixProject do
    use Mix.Project
  
    def project do
      [
        app: :crowller,
        version: "0.1.0",
        elixir: "~&gt; 1.7",
        start_permanent: Mix.env() == :prod,
        deps: deps()
      ]
    end
  
    # Run "mix help compile.app" to learn about applications.
    def application do
      [mod: {Crowller.Application, []}]
    end
  
    # Run "mix help deps" to learn about dependencies.
    defp deps do
      [
        {:poison, "~&gt; 3.1"}, # json library
        {:httpoison, "~&gt; 1.4"}, # json library
      ]
    end
  end
  </code></pre>
  
  <p>This is my <code>Crowller.Application</code> module:</p>
  
  <pre class="lang-ex prettyprint-override"><code>defmodule Crowller.Application do
    use Application
    import Crowller.Data
    import Crowller.Controller
  
    def start(_, _) do
      key_groups = struct(Crowller.Data.ServerList).keygroups
      for index &lt;- 0..length(key_groups)-1 do
        Task.start(fn() -&gt;
          matched_group(Enum.at(key_groups, index))
        end)
      end
    end
  
  end
  </code></pre>
  
  <hr>
  
  <p>And this is the error I get:</p>
  
  <pre><code>=INFO REPORT==== 15-Nov-2018::18:54:04.741174 ===
      application: crowller
      exited: {bad_return,
                  {{'Elixir.Crowller.Application',start,[normal,[]]},
                   {'EXIT',
                       {undef,
                           [{'Elixir.Crowller.Application',start,[normal,[]],[]},
                            {application_master,start_it_old,4,
                                [{file,"application_master.erl"},
                                 {line,277}]}]}}}}
      type: permanent
  ** (exit) exited in: GenServer.call(Mix.ProjectStack, {:get_and_update, #Function&lt;14.775349/1 in Mix.ProjectStack.printable_app_name/0&gt;}, 30000)
      ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
      (elixir) lib/gen_server.ex:914: GenServer.call/3
      (mix) lib/mix/shell/io.ex:15: Mix.Shell.IO.print_app/0
      (mix) lib/mix/shell/io.ex:34: Mix.Shell.IO.error/1
      (mix) lib/mix/tasks/app.start.ex:135: Mix.Tasks.App.Start.ensure_all_started/2
      (elixir) lib/enum.ex:765: Enum."-each/2-lists^foreach/1-0-"/2
      (elixir) lib/enum.ex:765: Enum.each/2
      (mix) lib/mix/tasks/app.start.ex:114: Mix.Tasks.App.Start.start/2
      (mix) lib/mix/tasks/app.start.ex:86: Mix.Tasks.App.Start.run/1
  *** Shell process terminated! (^G to start new job) ***
  {"Kernel pid terminated",application_controller,"{application_start_failure,crowller,{bad_return,{{'Elixir.Crowller.Application',start,[normal,[]]},{'EXIT',{undef,[{'Elixir.Crowller.Application',start,[normal,[]],[]},{application_master,start_it_old,4,[{file,\"application_master.erl\"},{line,277}]}]}}}}}"}
  Kernel pid terminated (application_controller) ({application_start_failure,crowller,{bad_return,{{'Elixir.Crowller.Application',start,[normal,[]]},{'EXIT',{undef,[{'Elixir.Crowller.
  Application',start,
  </code></pre>