Missing values in object in R lme
<p>I am working on a simple model in R:</p>

<pre><code>fit&lt;-lme(x~y, data, random=~1|subject)
</code></pre>

<p>But I keep getting this error:</p>

<blockquote>
  <p>Error in na.fail.default(list(h1 = c(103L, 20L, 34L, 85L, 47L, 136L,
  76L,  :    missing values in object</p>
</blockquote>

<p>(h1 is one of my column titles of a factor)</p>

<p>Any idea on how to fix this? An identical model works with a different set of data.</p>