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HTTP Error 500-12 Application Restarting
Internet Information Services
After all of the current user requests have been processed, the server deletes all active sessions, calling the Session_OnEnd event for each session it deletes, closes the application, and then calls the Application_OnEnd event. The Global.asa file is then recompiled.
Subsequent user requests will start the application and create new sessions, and trigger the Application_OnStart and Session_OnStart events. When you view an ASP page while the application is running Application_OnStart, the following error message occurs:
This error message may also be caused by anti-virus or backup software. When these software packages scan an IIS Web application, IIS may behave as if the Global.asa file has been modified and may therefore restart the Web application. Turning off backup software and virus scanning on the Global.asa file may help resolve this issue. If a client GET request is made during this time, the web server will return a 500-12 error.
For additional information on the same error message occurring in Site Server 3.0, Commerce Edition, click the article number below to view the article in the Microsoft Knowledge Base: