title: Stata ambiguous abbreviation r(111)
body: <p>I am trying to draw marginplot using stata12. I am running the following code:</p>
  
  <pre><code>margins, at(FuncVariant =(0(0.2) 1)) over(Platform)
  </code></pre>
  
  <p>Following is the error:</p>
  
  <blockquote>
    <p>FuncVariant ambiguous abbreviation r(111);</p>
  </blockquote>
  
  <p>I have the following variables like </p>
  
  <pre><code>FuncVariant :
  FuncVariant 
  FuncVariant_mean
  FuncVariant_W
  </code></pre>
  
  <p>Is that creating a problem?</p>