AX 2012 Help Server error: Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

Hi,

To resolve this issue, run the following command line: 

aspnet_regiis.exe /iru

The Aspnet_regiis.exe file can be found in one of the following locations:

%windir%\Microsoft.NET\Framework\v4.0.30319

%windir%\Microsoft.NET\Framework64\v4.0.30319 (on a 64-bit computer)

HTTP Error 500.24 – Internal Server Error + HELP SERVER ERROR AFTER INSTALLING ON AX 2012 + ERROR – Unable to contact the server

Hi,

This error may arises at any of this name for same reason.

HTTP Error 500.24 – Internal Server Error,

The Location of the help server has not been specified.

ERROR – Unable to contact the server etc...

HTTP Error 500.24 – Internal Server Error

An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.

Detailed Error Information

Module	ConfigurationValidationModule
Notification	BeginRequest
Handler	svc-Integrated
Error Code	0×80070032
Requested URL	http://testserver:8080/DynamicsAX6HelpServer/HelpService.svc
Physical Path	C:\inetpub\wwwroot\DynamicsAX6HelpServer\HelpService.svc
Logon Method	Not yet determined
Logon User	Not yet determined

 Solution:

1. Check that Directory browsing is enabled(IIS MANAGER>SITES>DIRECTORY BROWSING(DOUBLE CLICK AND ENABLE IT)
2. Go to Ax 2012>System administration > setup>system>Help system parameters

(check the location should be as

Eg:-  http://ServerName/DynamicsAX6HelpServer/HelpService.svcthe

http://tcschennaiserver/DynamicsAX6HelpServer/HelpService.svc

1. Also when you browse the site in IIS manager it will tell you ASP.NET 4.0 check for Integrated pipeline mode
1. Check the below criteria it should be the same
2. IIS>Application Pools>
3. ASP.NET4.0                                  V4.0       CLASSIC
4. ASP.NET4.0 CLASS                        V4.0       CLASSIC
5. CLASSIC .NET APPLICATION           V2.0       CLASSIC
6. DEFAULT APP POOL                       V2.0       INTEGRATED
7. DYNAMICS AX HELP SERVER          V4.0       INTEGRATED(Version will be 2.0 change to 4.0 and check)  pls keep in mind DynamicAX  HelpSVC >ASP.NET IMPERSONATION SHOULD BE DISABLE(DON’T ENABLE)