title: Specifying Source file name using parameter variables in informatica 9?
body: <p>I have a mapping like</p>
  
  <pre><code> SA--&gt;SQ---&gt;EXPR---&gt;TGT
  </code></pre>
  
  <p>The source will be of the same structure and the tartget also.</p>
  
  <p>There are a bunch of files(with the same structure) which will go through this mapping .</p>
  
  <p>So i want to use a parameter file through which i will give the file names for every run manually.</p>
  
  <p>How to use the param file in session for <code>Source filename</code> attribute </p>
  
  <p>Please suggest..</p>