title: How can I fix this compile error, when attempting to compile sass using Prepros and Gumby?
body: <p>I am using windows 7 to compile .scss with an application known as Prepros. (<a href="http://alphapixels.com/prepros/" rel="nofollow">http://alphapixels.com/prepros/</a> ). I also downloaded the Gumby Framework(<a href="http://gumbyframework.com/" rel="nofollow">http://gumbyframework.com/</a>) into my document root directory of localhost web-server. My goal is to use the gumby framework along with Prepros.</p>
  
  <p>When I attempt to compile the scss file, I am receiving the following error:</p>
  
  <pre><code>Syntax error: Undefined operation: "power(golden_ratio(), 1) times 16px".
      on line 52 of Z:/Ampps/www/Gumby-master/sass/extensions/modular-scale/stylesheets/_modular-scale.scss
      from line 23 of Z:\Ampps\www\Gumby-master\sass\gumby.scss Use --trace for backtrace.
  </code></pre>
  
  <p>Also, if it is helpful, this is the config.rb file contained within the folder www\Gumby-master :</p>
  
  <pre><code># Require any additional compass plugins here.
  # Tell compass where to find local extensions
  # If you followed directions and ran 'gem install modular-scale' comment the next two     lines out:
  extensions_dir = "sass/extensions"
  Compass::Frameworks.register('modular-scale', :path =&gt; File.expand_path("#  {extensions_dir}/modular-scale"))
  # Uncomment these to use regular Ruby gems.
  # require 'modular-scale'
  # require 'sassy-math'
  # Set this to the root of your project when deployed:
  http_path = "/"
  css_dir = "css"
  sass_dir = "sass"
  images_dir = "img"
  # You can select your preferred output style here (can be overridden via the command   line) :nested or :expanded or :compact or :compressed:
  output_style = :compact
  # To enable relative paths to assets via compass helper functions. Uncomment:
  # relative_assets = true
  
  # To disable debugging comments that display the original location of your selectors.     Uncomment:
  line_comments = false
  
  
  # If you prefer the indented syntax, you might want to regenerate this
  # project again passing --syntax sass, or you can uncomment this:
  # preferred_syntax = :sass
  # and then run:
  # sass-convert -R --from scss --to sass sass scss &amp;&amp; rm -rf sass &amp;&amp; mv scss sass
  </code></pre>
  
  <p>Lastly,I reviewed <a href="https://plus.google.com/111923336570033452384/posts" rel="nofollow">this</a> thread, but I did not find it helpful.</p>