title: Migrate from Joomla 2.5.17 to Joomla 3.2.1 Failed
body: <p>I am trying to upgrade my website from Joomla 2.5.17 to Joomla 3.2.1.
  The website has very few 3rd party extensions.</p>
  
  <p>First I restored my website on my local computer. 
  Then I uninstall all the third party extensions and templates.
  Then tried to upgrade using one-click Joomla Upgrade manager.
  After the upgrade was completed, a blank page was displayed.</p>
  
  <p>Since I did not see any error, I refreshed the page and the below error message was displayed:</p>
  
  <p>Error:</p>
  
  <blockquote>
    <p>1091 Can't DROP 'usertype'; check that column/key exists SQL=ALTER
    TABLE <code>xxx_users</code> DROP KEY <code>usertype</code>;</p>
  </blockquote>
  
  <p>I checked the 'xxx_users' table to see if 'usertype' column existed or not. There was no column named usertype' in the 'xxx_users' table.</p>
  
  <p>When I try to access any menu from the Joomla Administrator section, the following error message is displayed:</p>
  
  <p>Error:</p>
  
  <blockquote>
    <p>Notice: Undefined property: InstallerController::$input in
    E:\xxx\xxx\public_html\administrator\components\com_installer\controller.php
    on line 39 Fatal error: Call to a member function get() on a
    non-object in
    E:\xxx\xxx\public_html\administrator\components\com_installer\controller.php
    on line 39</p>
  </blockquote>
  
  <p>What am I doing wrong?</p>
  
  <p>Any help will be appreciated.</p>