Assetic doesn't work very wells with this tag:

```
{% stylesheets output='/style/app.css'
    '@VendorBundle/Resources/style/main.css'
%}
    <link rel="stylesheet" href="{{ asset_url }}"/>
{% endstylesheets %}

```

If I use it, it's like Assetic doesn't know what to do with this. In config\_dev `use_controller` is true. I can't find what I'm doing wrong. I just get this:

> 
> An exception has been thrown during the rendering of a template ("Unable to generate a URL for the named route "\_assetic\_aca6c7a\_0" as such route does not exist.") in "VendorBundle:Section:template.html.twig".
> 
> 
> 

Maybe some cache issue? I don't know what I can try...