If you have integrated Asset Bank with IIS then you may encounter the following error:

HTTP Error 404.15 - Not Found

The request filtering module is configured to deny a request where the query string is too long.

This can happen when operating on large numbers of assets in lightboxes, particularly in recent (as of September 2014). 

To fix this error, increase the maxQueryString and maxUrl settings as follows:

• Open an Administrator command prompt
• Run the following command:
  

  %windir%\system32\inetsrv\appcmd set config "Default Web Site" /section:requestFiltering /requestLimits.maxQueryString:20480 /requestLimits.maxUrl:20480

  (this edits C:\inetpub\wwwroot\web.config).
• Restart IIS:

  net stop w3svc
  
  net start w3svc