WCF Service returning “requested service '…' could not be activated” the first time it's accessed from an MVC site

Question

We have a WCF service (with no security) that is being accessed by an MVC3 website.

On the developer machines we have no problems with it but when our TeamCity setup bui

Answer 1

This error occurs if you install IIS after installing Windows Communication Foundation (WCF). To fix it, simply run the following command:

"%WINDIR%\Microsoft.Net\Framework\v3.0\Windows Communication Foundation\ServiceModelReg.exe" -r

Source: IIS Hosted Service Fails