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Category Archives: HTTP

HTTP could not register URL

From here on, I am going try to publish the exceptions/error messages I encounter during the programming and their corresponding resolution.


I wrote a self host in Visual Studio 2005 in Windows XP. It worked fine.

namespace CalculatorHost
    class Program
        static void Main(string[] args)
            ServiceHost host = new ServiceHost(typeof(CalculatorService), 
                new Uri[] { new Uri("http://localhost:8080/Calculator") });
                new BasicHttpBinding(), "");
            ServiceMetadataBehavior behavior = 
                new ServiceMetadataBehavior();
            behavior.HttpGetUrl = new 
            behavior.HttpGetEnabled = true;
            Console.WriteLine("Calculator Service Started!!!"+
                "\nPress enter to stop the service");

I tried to execute the same program in Visual Studio 2010 in Windows 7. But it gave the following exception.

HTTP could not register URL http://+:8080/CalculatorService/Meta/. Your process does not have access rights to this namespace (see for details).

Note: I received the same exception for http://localhost:8080/Calculator as well.


The exception itself has offered helping hands on how to register Http Namespace by saying(see for details).

It takes us to the Microsoft’s title “Configuring HTTP and HTTPS”. The exception above resolved by following the solution under “Configuring Namespace Reservations”.

I ran the following command under the .Net Command Prompt.

C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC>netsh http add urlacl url

=http://+:8080/CalculatorService/Meta/ user=\Everyone

Url reservation add failed, Error: 5

The requested operation requires elevation (Run as administrator).

I didn’t get through it yet, because by default the .Net command prompt doesn’t have access to register the Http Namespaces.

I reran the .Net command prompt in Administrator mode (Right Click the .Net Command Prompt in Start Menu, and select Run as Administrator).

The same command worked well in Administrator mode.

C:\Windows\system32>netsh http add urlacl url=http://+:8080/CalculatorService/Me

ta/ user=\Everyone

URL reservation successfully added

Another simple alternate to using netsh http command is to run the Visual Studio itself in Administrator mode.

Note: netsh is useful for a verity of work. Refer the following pages for more detail.

Netsh Command Reference

Netsh Commands for Hypertext Transfer Protocol (HTTP)