You may receive the following error message when you try to
debug a Web application:
problem occurs when the following conditions are true:
- You are logged on to your computer with administrative
- You are debugging a Web application in Microsoft Visual
- The operating system that you are using is Microsoft
Windows XP Service Pack 2.
- The Microsoft ASP.NET worker process account is not a
member of the Administrators group.
The problem occurs because the ASP.NET worker process does
not have the Impersonate a client after authentication
user right. If the worker process account does not have this
right, the debugger cannot attach to the process. The worker process account is
configured by using the processModel
element in the Machine.config file.
To give the worker process account the Impersonate a client after authentication
user right, follow these steps:
- Click Start, point to
Settings, and then click Control
- Double-click Administrative
- Double-click Local Security
- Expand Security Setting, expand
Local Policies, and then click User Rights
- In the Policy pane, right-click
Impersonate a client after authentication, and then click
- Click Add User or Group.
- Add the worker process account that is configured in the processModel element in the Machine.config file.
- Click OK two times.
- Click Start, click Run,
type iisreset, and then click
- At a command prompt, type the following command to refresh
policies on the computer:
Steps to reproduce the problem
- Open the Machine.config file. Locate the processModel element.
- Replace the username attribute and the password
attribute as a non-administrative user.
- Restart Internet Information Services (IIS).
- Log off your computer. Log on your computer so that you
have administrative permissions.
- Start Visual Studio .NET.
- Create a new Web application.
When you try to
debug the Web application, you may receive the following error message:
Error while trying to run project: Unable to start debugging on
the web server. Access is denied.
For more information about developing software in Visual
Studio .NET that has non-administrative permissions, visit the following
Microsoft Developer Network (MSDN) Web site:
Article ID: 894433 - Last Review: May 18, 2007 - Revision: 3.5
- Microsoft Visual Studio .NET 2002 Academic Edition
- Microsoft Visual Studio .NET 2002 Enterprise Architect
- Microsoft Visual Studio .NET 2002 Enterprise Developer
- Microsoft Visual Studio .NET 2002 Professional Edition
- Microsoft Visual Studio .NET 2003 Academic Edition
- Microsoft Visual Studio .NET 2003 Enterprise Architect
- Microsoft Visual Studio .NET 2003 Enterprise Developer
- Microsoft Visual Studio .NET 2003 Professional Edition
- Microsoft ASP.NET 1.1
- Microsoft ASP.NET 1.0
- Microsoft Windows XP Service Pack 2
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