Server OS is: Windows 2003 R2 X64
Webserver is: IIS 6

There is an error in Event log:

It is not possible to run two different versions of ASP.NET in the same IIS process. Please use the IIS Administration Tool to reconfigure your server to run the application in a separate process.

I have a lot of websites, how can I find this error related to which website or application pool?


I have just run into this error, the quickest thing for me was to run this:

C:\windows\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis.exe -lk

This produces a list of the websites and which .NET versions they are using. I then checked the application pool of those listed to verify which has a problem.

I'd love a solution that just pointed right at the answer but this certainly helped.

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