title: Unsupported on-disk structure for file mydatabase.fdb
body: <p>My old delphi 7 application was using devart Interbase driver to connect with mydatabase.fdb. When I migrated this application to delphi xe4, I installed latest version of devart interbase for delphi xe4. But with this version, I am getting following error:</p>
  
  <pre><code>Unsupported on-disk structure for file mydatabase.fdb
  </code></pre>
  
  <p>What is the cause of this error? How should I get rid from it?</p>
  
  <p>I found the link: <a href="http://www.firebirdfaq.org/faq80/" rel="nofollow">http://www.firebirdfaq.org/faq80/</a></p>
  
  <p>2 reasons are mentioned there for possible causes for this error. But I think these are not applicable to me. Then why am I getting this error?</p>