G Mastros G Mastros - 4 months ago 41
ASP.NET (C#) Question

500.21 Bad module "ManagedPipelineHandler" in its module list

I am getting the error:

HTTP Error 500.21 - Internal Server Error
Handler "CloudConnectHandler" has a bad module "ManagedPipelineHandler" in its module list

my web.config file looks like this:

<?xml version="1.0" encoding="utf-8"?>
<add name="CloudConnectHandler" verb="*" path="CloudConnect.aspx" type="CloudConnectHandler" resourceType="Unspecified" />
<customErrors mode="Off" />
<compilation debug="true" targetFramework="4.0" batch="false">
<add assembly="System.Xml.Linq, Version=, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Core, Version=, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="Microsoft.CSharp, Version=, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" />
<identity impersonate="true" />
<authentication mode="Forms" />
<compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<providerOption name="CompilerVersion" value="v4.0" />
<providerOption name="WarnAsError" value="false" />
<add key="CloudConnectAuthorization" value="xxxx" />
<add key="ConnectionInfo" value="xxxx" />
<add key="ConnectionString" value="xxxx" />
<add key="DefaultChannel" value="xxxx" />
<add key="LoginValidationConnectionString" value="xxxx" />
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<assemblyIdentity name="protobuf-net" publicKeyToken="257b51d87d2e4d67" culture="neutral" />
<bindingRedirect oldVersion="" newVersion="" />

There is a lot of advice out there indicating that asp.net is not installed correctly. The usual fix is to run:

%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i


%windir%\Microsoft.NET\Framework\v4.0.21006\aspnet_regiis.exe -i

I have run both, without any errors. I have restarted IIS, but the problem still persists. The site is using an application pool. The app pool is started, .net framework = 4.0, Managed Pipeline = Classic, Identity = LocalSystem.

I've spent the last couple hours trying to figure out what the problem is. I'm hoping someone can help.


Try switching to Integrated mode. See the following thread:

IIS 7, HttpHandler and HTTP Error 500.21