title: token expression in flat file connection
body: <p>I have loaded the variables in the format for example: </p>
  
  <pre><code>where produkt = 'Muj zivot2 R' and uraz = 'Uraz' 
  </code></pre>
  
  <p>and I need the output in the file name to be: </p>
  
  <blockquote>
    <p>Muj zivot2 R_Uraz</p>
  </blockquote>
  
  <p>token worked for me, but it doesn't work in this case</p>
  
  <pre><code>" + TOKEN(" @[User::where] ","''",2) + "_" + TOKEN(" @[User::where] ","''",4) + "
  </code></pre>