title: parsing "?<=Sys ).*" - Quantifier {x,y} following nothing
body: <p>I am trying to use this code below. However. It gives me error.</p>
  
  <p>Error:</p>
  
  <pre class="lang-none prettyprint-override"><code>parsing "?&lt;=Sys ).*" - Quantifier {x,y} following nothing.
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>System.Text.RegularExpressions.Regex.Match(line, "?&lt;=Sys ).*").ToString
  </code></pre>
  
  <p>Sample Text:</p>
  
  <pre class="lang-none prettyprint-override"><code>G Operating Sys (Linux Redhat v6.x, Ent 64 bit (small
  G Operating Sys (OS8 MS Win Svr 2012R2 EE)
  </code></pre>
  
  <p>What does the error mean?</p>