Could not load type 'System.ServiceModel.Activation.HttpModule'" is thrown when attempting to open EVS after an upgrade to EV
Article ID: 100034309
Updated On:
Description
Error Message
Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.TypeLoadException: Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
Cause
This can be down to a problem within the ApplicationHost.Config file, for Windows Process Activation, found in the below location on the EV Server:-
%windir%\System32\Inetsrv\config
Resolution
1) Copy an ApplicationHost.Config file from a known good working EV Server on the same EV and .NET Version
2) Stop the Windows Process Activation Service on the non-working EV Server
3) Rename the non-working ApplicationHost.Config file to ApplicationHost.Config_old
4) Paste the good ApplicationHost.Config file to the non-working EV Server
5) Start the Windows Process Activation Service
If the above suggestion does not fix the issue for you then please contact Technical Support for further help
Issue/Introduction
Could not load type 'System.ServiceModel.Activation.HttpModule'
