Diagnosing "The specified module could not be found" on IIS7 with ASP.Net

Posted by Baldy on Server Fault See other posts from Server Fault or by Baldy
Published on 2012-03-31T08:03:08Z Indexed on 2012/03/31 11:33 UTC
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windows-server-2008-r2

|

iis7

I am migrating some web apps from a windows 2003 server with IIS6 server to a Windows server 2008 R2 server with IIS7.

One of the apps, which runs on asp.net v2.0 using forms authentication will not load.

It gives me the following error...

The specified module could not be found. (Exception from HRESULT: 0x8007007E)

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: The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Now i fully understand that the app cannot load some kind of resource due to a FileNotFoundException, but i am struggling to diagnose exactly where in the application this is happening, as it does not tell me what the module is, nor what file it is looking for.

I have enabled failed request tracing and i get back a complete request trace, yet i cannot find anything that gives me detail on this specific error, or the module involved.

Any advice on diagnosing the root cause of the issue would be greatly appreciated.

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