Error while trying to run ASP.NET application

  • Article

Q: When I run the application the following error has occured.

"Unable to start debugging on the web server."

In debug window the following message occured:

"Auto-attach to process '[3836] aspnet_wp.exe' on machine '<machinename>'' failed. Error code 0x8013134b."

 

A: This error occurs when more than one .NET framework is installed, and IIS is set to run an application developed in one framework version using the other.

Solution:

In IIS, open up your website application, right-click and select properties, and choose the "ASP.NET" tab. Change the ASP.NET version to the appropriate version required by the project.

 

Q: When I execute the asp.net application it gives the following error message.

"Error while trying to run project: Unable to start debugging on the web server"

 

A: This issue occurs if the account that is used to run the ASP.NET Worker process (by default, the ASPNET user account) is not assigned the "Impersonate a client after authentication" user right in the Local Security Policy settings

Try these steps.

1.

Click Start, point to Programs, point to Administrative Tools, and then click Local Security Policy.

2.

Double-click Local Policies, and then click User Rights Assignment.

3.

In the right pane, double-click Impersonate a client after authentication.

4.

In the Local Security Policy Setting dialog box, click Add.

5.

In the Select Users or Group dialog box, click ASPNET, click Add, and then click OK.

6.

Click OK.