Could not load type System ServiceModel Activation HttpModule from assembly System ServiceModel

Question

I m running my Web Project in IIS   It is a 4 0 Framework APP   I have a Service svc and I get this error when I run my Application       Could not load type  System ServiceModel Activation HttpModule  from   assembly  System ServiceModel  Version 3 0 0 0  Culture neutral    PublicKeyToken b77a5c561934e089     I tried this --  aspnet regiis exe -iru which I found in a lot of forums and it didn t solve my problem   Does anyone know another method

User · Answer

I have Windows 8 installed on my machine, and the aspnet_regiis.exe tool did not worked for me either.

The solution that worked for me is posted on this link, on the answer by Neha: System.ServiceModel.Activation.HttpModule error

Everywhere the problem to this solution was mentioned as re-registering aspNet by using aspnet_regiis.exe. But this did not work for me.

Though this is a valid solution (as explained beautifully here)

but it did not work with Windows 8.

For Windows 8 you need to Windows features and enable everything under ".Net Framework 3.5" and ".Net Framework 4.5 Advanced Services".

Thanks Neha

User · Answer

This issue occurs because the Applicationhost config file for Windows Process Activation Service  WAS  has some tags that are not compatible with the  NET Framework 4 0  Based on your environment  you have 4 workarounds to solve this issue   Updating Applicationhost config  Perform ASP NET IIS Registration  Turn on the Named Pipe Activation feature  Remove ServiceModel 3 0 from IIS   Check the detailed steps for each woraround at Solving Could not load type system servicemodel activation httpmodule from assembly System ServiceModel

User · Answer

From the Server Manager s Features node  you can also remove some of the sub-items under the  NET Framework 3 5 1 Features that are installed by the activation of some of the other roles     For instance  removed the WCF Activation Features as follows and our websites came back     x   NET Framework 3 5 1 Features          x   NET Framework 3 5 1         WCF Activation                    HTTP Activation             Non-HTTP Activation                   Note  this did not require a restart for us

User · Answer

I got this error after I accidentally published one website into the directory of another website  The two websites had different versions of  net  What fixed it for me was changing the application pool  To do that  in the IIS manager   click the website    Advanced Settings     on the right     click to the right of Application Pool    a button with       should appear    select   NET v4 5 Classic   If that application pool doesn t work  try some of the others

User · Answer

In Windows server 2012  Go to ISS -  Modules -  Remove the ServiceModel3-0

User · Answer

I am late  hope it will help someone     This is a known issue with IIS 8 0     The solution is to delete the 3 x module and handler from IIS manager  You could delete them at the application or site level if you want to keep them in applicationHost config  But I wanted to delete them from applicationHost config  do the following steps       In IIS manager  click the machine name node    In    Features View     double-click    Modules       Find    ServiceModel    and remove it    Image 1 for Solve IIS 8 Error  Could not load type    System ServiceModel Activation HttpModule         Go back to the machine name node   s    Features View     double-click    Handler Mappings       Find    svc-Integrated    and remove it    Image 2 for Solve IIS 8 Error  Could not load type    System ServiceModel Activation HttpModule

User · Answer

You might changed the IIS features settings The easy steps to resolve by open command prompt  with run as administrator For Windows Server 2008  and run the command C  WINDOWS Microsoft NET Framework v4 0 30319 aspnet regiis exe -iru this will set up ASP Net 4 0  Then Reset the IIS by the command iisreset References  https   support plesk com hc en-us articles 213392249-ASP-website-shows-error-Could-not-load-type-System-ServiceModel-Activation-HttpModule-from-assembly

User · Answer

Ok  finally got it   Change this line in  windir  System32 inetsrv Config ApplicationHost config   lt add name  ServiceModel  type  System ServiceModel Activation HttpModule  System ServiceModel  Version 3 0 0 0  Culture neutral  PublicKeyToken b77a5c561934e089  preCondition  managedHandler    gt    To   lt add name  ServiceModel  type  System ServiceModel Activation HttpModule  System ServiceModel  Version 3 0 0 0  Culture neutral  PublicKeyToken b77a5c561934e089  preCondition  managedHandler runtimeVersionv2 0    gt    If this is not enough  Add this following line to the Web config   lt system webServer gt     lt modules runAllManagedModulesForAllRequests  true   gt   lt  system webServer gt

User · Answer

start-  Run--  c  WINDOWS Microsoft NET Framework v4 0 30319 aspnet regiis exe -iru

User · Answer

Details  http   msdn microsoft com en-us library hh169179 v nav 71  aspx   This error can occur when there are multiple versions of the  NET Framework on the computer that is running IIS

User · Answer

We are using a web service along side a web site and when we publish the web site it returns same this error   We found out that by going into IIS and removing the ServiceModel from Modules and the svc-Integrated from the Handler Mappings the error went away

User · Answer

Hello Thanks for the question   To resolve   Could not load type  System ServiceModel Activation HttpModule  from assembly  System ServiceModel  Version 3 0 0 0  Culture neutral  PublicKeyToken b77a5c561934e089    In Windows Features check all for  NET 4 Advanced Services  amp   NET 3 5     Just like Nicolas Gago I tried aspnet regiis exe -iru but it didn t work  After the features were on then it yellow screen error was gone  Thanks

User · Answer

Try with   c  WINDOWS Microsoft NET Framework v4 0 30319 aspnet regiis exe -iru   When multiple versions of the  NET Framework are executing side-by-side on a single computer  the ASP NET ISAPI version mapped to an ASP NET application determines which version of the common language runtime  CLR  is used for the application    Above command will Installs the version of ASP NET that is associated with Aspnet regiis exe and only registers ASP NET in IIS   https   support microsoft com en-us help 2015129 error-message-after-you-install-the--net-framework-4-0-could-not-load

User · Answer

You can install these features on windows server 2012 with powershell using the following commands   Install-WindowsFeature -Name  NET-Framework-Features -IncludeAllSubFeature Install-WindowsFeature -Name  NET-WCF-HTTP-Activation45 -IncludeAllSubFeature   You can get a list of features with the following command   Get-WindowsFeature   Format-Table

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delete the module which is identified in  Net error message    1 down vote  In Windows server 2012  Go to ISS -  Modules -  Remove the ServiceModel3-0   without number worked for me

[iis] Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel

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