Re: Problem with Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'ScriptHandlerFactory'

Leo Tang - MSFT — Fri, 03 Jul 2009 07:42:20 GMT

Hi,

As the error message indicates , there are duplicate collection entry. You can try add the following section at the beginning of the handler section:
<remove name="ScriptHandlerFactory">

The website will inherits the settings form parent level . This should be the reason of this issue. You can check if there is a web.fig file in the parent web content folder(e.g. C:\inetpub\wwwroot\arif\ or C:\inetpub\wwwroot ) and an duplicate collection entry in it.

Problem with Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'ScriptHandlerFactory'

arifliminto86 — Tue, 30 Jun 2009 04:47:25 GMT

Hi, my name is Arif,

I've tried to deploy the website in windows server 2008 (IIS 7.0). However, it does not work successfully. I developed the website using windows xp and I also have tried to published in windows xp and it works great.

For that projects, I use AJAX. in windows server 2008(IIS 7.0) I am sure that I have installed ajax extension which is the same version that i have installed in my local machine ( windows xp).

Here is the error details that I've got, any idea how to solve this error?

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Detailed Error Information

Module	IIS Web Core
Notification	BeginRequest
Handler	Not yet determined
Error Code	0x800700b7
Config Error	Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'ScriptHandlerFactory'
Config File	\\?\C:\inetpub\wwwroot\arif\arif\web.config

Requested URL	http://localhost:80/arif/arif/index.htm
Physical Path	C:\inetpub\wwwroot\arif\arif\index.htm
Logon Method	Not yet determined
Logon User	Not yet determined

Config Source

  142:         
  143:         <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode"
  144:              type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

IIS7 - Publishing

Re: Problem with Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'ScriptHandlerFactory'

Problem with Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'ScriptHandlerFactory'

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.