How to Add a Fault Message
When you create a port to the back-end system, it contains a request and a response. You must add a message so that you can assign it to the fault.
To add a fault message
In the Orchestration View window, right-click Messages, and select New Message.
This creates Message_3, which you can assign specifically to the fault.
Right-click Message_3, and select Properties.
In the Properties dialog box, set the Message Type.
Select .NET Classes and then select SystemString.