title: Symfony 3 (Prod) : You have requested a non-existent service "assetic.asset_manager"
body: <p>I'm trying to run this cmd, which is supposed to dump assetic files for prod environment :</p>
  
  <pre><code>php bin/console assetic:dump --env=prod
  </code></pre>
  
  <p>This cmd returns the following error :</p>
  
  <blockquote>
    <p>[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]
        You have requested a non-existent service "assetic.asset_manager".</p>
  </blockquote>
  
  <p>When i try to access the prod page through my browser, i've got the following error :</p>
  
  <blockquote>
    <p>An exception has been thrown during the rendering of a template
        ("Unable to generate a URL for the named route "_assetic_2f6a151_0" as such route does not exist.")
        in YOCoreBundle::layout.html.twig at line 14</p>
  </blockquote>
  
  <p>Everything is working fine in the dev environment (static files are minified and stored in the right folder) when i run this cmd :</p>
  
  <pre><code>php bin/console assetic:dump
  </code></pre>
  
  <p>Regarding my configuration :</p>
  
  <p>In composer.json :</p>
  
  <pre><code>{
    "require": {
       "symfony/assetic-bundle": "^2.8.0",
       "leafo/scssphp": "~0.6",
       "patchwork/jsqueeze": "~1.0"
    }
  }
  </code></pre>
  
  <p>In app/config/config.yml i have the following code :</p>
  
  <pre><code>assetic:
    debug:          '%kernel.debug%'
    use_controller: '%kernel.debug%'
    filters:
      cssrewrite: ~
      jsqueeze:   ~
      scssphp:
        formatter: 'Leafo\ScssPhp\Formatter\Compressed'
  </code></pre>
  
  <p>AsseticBundle is declared in the AppKernel.php :</p>
  
  <pre><code>$bundles = [
    new Symfony\Bundle\AsseticBundle\AsseticBundle(),
  ];
  </code></pre>
  
  <p>I don't really know where the problem might be.
  If anyone has an idea about that, it would be really appreciated.
  Thanks in advance.</p>