There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined

Question

User-826062482 posted

I am trying to create an MVC2 web application that will run both on my local development machine (on localhost), and on our central webserver.

Development machine:

• Windows 7 Professional, 64bit
• Visual Studio 2010 (beta)
• ASP.NET 4.0
• IIS 7.5
  

Webserver:

• Windows Server 2003 SP2
• ASP.NET 3.5 SP1 (determined by checking the folders under %SystemRoot%\Microsoft.NET\Framework)
• IIS 6.0
  

Everything works fine when debugging from VS, and I've finally gotten so far that it also works copied to the webserver. However, when I try to copy it to my own local webserver, I get the following error message:

<fieldset><legend>Error Summary</legend>

HTTP Error 500.19 - Internal Server Error

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

</fieldset>

<fieldset><legend>Detailed Error Information</legend>

Module	IIS Web Core
Notification	BeginRequest
Handler	Not yet determined
Error Code	0x800700b7
Config Error	There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined
Config File	\\?\C:\Temp\test2\web.config

Requested URL	http://localhost:80/mvc2
Physical Path	C:\Temp\test2
Logon Method	Not yet determined
Logon User	Not yet determined

</fieldset>

<fieldset> <legend>Config Source</legend>

   13: 			<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
   14: 				<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
   15: 				<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

</fieldset>

It almost goes without saying, I can not see any duplicate scriptResourceHandler section at all!

The application I am testing on, is the default application that is created when you use the ASP.NET MVC2 Web Application template. The target framework for the application is .NET 3.5. (Because it has to run on our central .NET 3.5 webserver.)

Is see now that I a comparable error message when trying to configure the web application in IIS7:

There was an error while performing this operation.

Details:

Filename: \\?\C:\Temp\test2\web.config
Line number: 14
Error: There is a duplicate 'system.web.extensions/scripting/scriptResourceHandler' section defined

Answer 1

User470413944 posted

Hi,

Correct me if I made a mistake, do you close the  sectionGroup scripting?

I'm looking forward for your reply.

Answer 2

User-345632295 posted

This is a known issue with ASP.NET 4.0 / vs 2010

See http://www.asp.net/learn/whitepapers/aspnet4/breaking-changes#0.1__Toc256770149

"The workaround for the second scenario is to delete or comment out all the system.web.extensions configuration section definitions and configuration section group definitions from the application-level Web.config file. These definitions are usually at the top of the application-level Web.config file and can be identified by the configSections element and its children."

Answer 3

User-826062482 posted

Hmmm there is definitely something wrong with the email notification system -- I never received any warning about replies to my question...

Anyhow, thanks for the replies!

Correct me if I made a mistake, do you close the  sectionGroup scripting?

Yes, the sectionGroup is closed. Like I said, this is the standard ASP.NET MVC2 Web Application template, without any modifications.

Answer 4

User-826062482 posted

This is a known issue with ASP.NET 4.0 / vs 2010

See http://www.asp.net/learn/whitepapers/aspnet4/breaking-changes#0.1__Toc256770149

"The workaround for the second scenario is to delete or comment out all the system.web.extensions configuration section definitions and configuration section group definitions from the application-level Web.config file. These definitions are usually at the top of the application-level Web.config file and can be identified by the configSections element and its children."

That did the trick! Wow, you would've thought such a problem would show up bug-tests... Thanks a million Bruce -- I can continue happy coding

Answer 5

User-345632295 posted

when you work in a hosting company, you get to see all these weird problems early ..

Answer 6

User-2093669957 posted

Commenting out the <sectionGroup name="system.web.extensions"...> worked for me.

Thanks!

Tim 

Answer 7

User977894839 posted

After commenting out the system.web.extension I got a further error wanting the  me to set the 

<customErrors mode="RemoteOnly"

After I did that I got the following error:

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: The browser or gateway element with ID 'safari1plus' cannot be found.

Source Error:

Line 1: <browsers> Line 2: <browser refID="safari1plus"> Line 3: <controlAdapters> Line 4: <adapter controlType="System.Web.UI.WebControls.Menu" adapterType="" />

Source File: C:\dashCommerce WebReady\WebReady\App_Browsers\chrome.browser    Line: 2

---

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

<!-- [ConfigurationErrorsException]: The browser or gateway element with ID 'safari1plus' cannot be found. (C:\dashCommerce WebReady\WebReady\App_Browsers\chrome.browser line 2) at System.Web.Compilation.ApplicationBrowserCapabilitiesCodeGenerator.GenerateCode(AssemblyBuilder assemblyBuilder) at System.Web.Compilation.AssemblyBuilder.AddBuildProvider(BuildProvider buildProvider) [HttpParseException]: The browser or gateway element with ID 'safari1plus' cannot be found. (C:\dashCommerce WebReady\WebReady\App_Browsers\chrome.browser line 2) at System.Web.Compilation.AssemblyBuilder.AddBuildProvider(BuildProvider buildProvider) at System.Web.Compilation.BuildProvidersCompiler.ProcessBuildProviders() at System.Web.Compilation.BuildProvidersCompiler.PerformBuild() at System.Web.Compilation.BrowserCapabilitiesCompiler.GetBrowserCapabilitiesType() at System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() [HttpException]: The browser or gateway element with ID 'safari1plus' cannot be found. (C:\dashCommerce WebReady\WebReady\App_Browsers\chrome.browser line 2) at System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() at System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() at System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) [HttpException]: The browser or gateway element with ID 'safari1plus' cannot be found. (C:\dashCommerce WebReady\WebReady\App_Browsers\chrome.browser line 2) at System.Web.HttpRuntime.FirstRequestInit(HttpContext context) at System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) -->

Is there some other application that I need to load to my local machine?

 

Thanks

Answer 8

User1587650447 posted

Even i faced same issue while creating MVC application and sharepoint portal configuraiton. I have sucessfully fixed this issue and check this post

http://code.cmsstores.com/there_is_a_duplicate_scriptresourcehandler_section_defined/

Answer 9

User446615338 posted

If you set the appropriate FRAMEWORK VERSION on the Application Pool ,it will work correctly.

 Projects developed in (2.0,3.0,3.5) should run under an Application Pool with .NET FRAMEWORK VERSION v2.0.50727 

 Projects developed in 4.0 should run under an Application Pool with .NET FRAMEWORK VERSION v4.0.30319