An error occurred attempting to determine the process id of the DNX process hosting your application

Question

I get this error message when I\'m trying to start the application.

An error occurred attempting to determine the process id of the DNX process host

Answer 1

Microsoft changed the hosting model as described in the release notes.

In project.json replace the dependency

"Microsoft.AspNet.Server.IIS": "1.0.0-beta7"

with

"Microsoft.AspNet.Server.Kestrel": "1.0.0-beta8"

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In web.config in the handlers section remove every entry except

The complete web.config will look like this:

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RC1: While using RC1 I had the error after moving the solution folder. After deleting the bin and obj folders everything worked again.
As user764754 noted, simply restarting Visual Studio can also help.