IIS 8.0 Detailed 500.0 Internal Server Error - IsapiModule Not Found

Question

I am working on a project that was originally built on a previous version on Visual Studio (pre-2013) and I am running into an error. I have searched and searched on google and stackoverflow including these resources:

• IIS 7.5 Detailed Error 500.0 - Internal Server Error occurred after enabling ServersideInclude with Windows 7 IIS 8 Express
• HTTP Error 500.0 – Internal Server error when you open an IIS 7.0 Webpage
• The HTTP status code in IIS 7.0, IIS 7.5, and IIS 8.0

The second and third links are even from Microsoft's error article!

Anyways, I have checked out a repository and opened the project in my Visual Studio 2013 that runs IIS 8.0 express. When I try and navigate to a page that is hosted on the production instance, it loads just fine. When I load it from the local instance, I get a HTTP Error 500.0 - Internal Server Error.

Here is the request summary of the error:

And here is the error page itself:

As you can see, it throws a 500.0 - Internal Server Error claiming that The specified module could not be found. The module it is referring to is the IsapiModule. I have read that I need to ensure the location of the Isapi.dll, but I do not know how to go about this. I have ensured that the pages I've requested are in the correct project directory. This internal server error happens when I try and navigate to most of the site's links, both locally and on the production server.

I am running with .NET 4.0 framework.

Please let me know if additional information is required. I have tried to be as transparent as possible.

Thanks.

Answer 1

The resolution to my errors were as follows:

• My project directory was listed on a network drive instead of the local C drive.

• The .asp handler was mapped to a 32-bit .dll (C:\Windows\Sys32\inetsrv\asp.dll) instead of the 64-bit .dll (C:\Windows\SysWOW64\inetsrv\asp.dll)

After moving the project and adjusting where the handler pointed, I am now able to continue threading through all the other bugs of my source code. :)

Sometimes its the simple things.