We've got some cases regarding index problems. The possible errors that can be observed may look like the following ones:

  1. ## Could not find file "C:\sitecore\SitecoreInetpub\indexes\master\system_1jql.fnm".

*Description: *An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

*Exception Details: *System.IO.FileNotFoundException: Could not find file "C:\sitecore\SitecoreInetpub\indexes\master\system_1jql.fnm".

  1. ## docs out of order

* Description: *An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

* Exception Details: *System.SystemException: docs out of orderThis can be cured by completing the following. Rebuild your search indexes in the Control Panel (see the picture below):

If it doesn't help, try to manually remove all index files in the following folders:
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](http://photos1.blogger.com/blogger/6839/1864/1600/control_panel.jpg)