Introduction

When double-clicking the 'Authentication' icon for the WMS web site (application) in the IIS Management Console, following error shows:






WMS ASP IIS error message:

    There was an error while performing this operation

    Details:
    Filename: \\?\C:\e-wms\IIS\web.config
    Line number: 15
    Error: there is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined

 

Cause

The web site is configured to run with .NET framework 4, while .NET framework 3.5 is required
 

Solution

By using IIS 'application pools', specific sites can be forced to run in a specific .NET version.
You can change the default application pool to use .NET 3.5, or you can create a specific application pool for WMS.
A specific pool is preferred when you are running multiple web site applications.

In IIS Manager, right-click 'Application Pools' and choose 'Add Application Pool'

Name the application pool and select .NET framework version: 2.0.50727 (=in fact Framework 3.5)

Next, select your WMS web site and select 'Basic Settings' in the far right panel.

In the 'Edit application' window, press "Select" and select the application pool you just created from the dropdown list.

Press OK.

Now the error should be solved.