IT:AD:Infrastructure:IIS:Diagnostics:Error Messages [Notes]

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# IT:AD:Infrastructure:IIS:Diagnostics:Error Messages #



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### HTTP Error 500.19 -- Internal Server Error ###

* [http://support.microsoft.com/kb/942055](http://support.microsoft.com/kb/942055)


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## Scenario ####
So far only seen that when hosting DNN4x (a .NET20 based app) in a .NET40 environment:

> `Configuration Error  
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.   
...  
Parser Error Message: The browser or gateway element with ID 'Safari1Plus' cannot be found.  
...  
Source Error:  
...  
Line 33:   <!-- http://www.sunrisebrowser.com/en/-->  
Line 34:   <!-- Mozilla/5.0 (Macintosh; U; PPC Mac OS X; fr-fr) AppleWebKit/125.5.7   (KHTML, like Gecko) SunriseBrowser/0.895 -->  
Line 35:   <gateway id="AppleWebKitCatchall" parentID="Safari1Plus">  
...  
Source File: D:\WEBSITES\DNN.SS\App_Browsers\OceanAppleWebKit.browser Line: 35  
...` 

#### Resolution ####
Change the AppPool to .NET20

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