title: ERROR: a 'NAMESPACE' file is required
body: <p>I am trying to install some R packages on a Linux machine using </p>
  
  <pre><code>R CMD INSTALL -l &lt;ourRlibrarylocation&gt; &lt;path where I saved the packagename.tar.gz file&gt;
  </code></pre>
  
  <p>and I see an error message: </p>
  
  <pre><code>ERROR: a 'NAMESPACE' file is required
  </code></pre>
  
  <p>I am using R 3.0.1. Please help, I am new to R and just downloaded these packages for customers. </p>
  
  <p>One example:</p>
  
  <pre><code> R CMD INSTALL -l /abcde/R/R-3.0.0/library /home/RFILES/PKG/UScensus2000tract_0.03.tar.gz
  * installing *source* package âUScensus2000tractâ ...
  ERROR: a 'NAMESPACE' file is required
  * removing â/abcde/R/R-3.0.0/library/UScensus2000tractâ
  </code></pre>