title: Stata: rename variables in lowercase when importing from Excel
body: <p>I'm trying to import an Excel sheet that has variable names which have a mix of uppercase and lowercase letters.  I want Stata to read them all as lower case but when I put the <code>case(lower)</code> option in, Stata returns <code>option case() not allowed</code>.</p>
  
  <p>Here is what I try to put in: </p>
  
  <pre><code>import excel "/Users/p/D/B/File name/", sheet("Sheet1") firstrow case(lower)
  </code></pre>
  
  <p>The <code>import</code> command works fine when I don't use the <code>case()</code> option. Can someone tell me what I'm doing wrong? </p>