Select the variable definition, either message type or element. Then select a variable from the list.
Open the Fault Variable Definition dialog from the Properties view of a catch container.
Select
Message Type
for a list of all available messages.
Select Element if the message has a single part and that part is defined with an element type.
After you select a variable definition, return to the Properties view of the catch to type in a Variable name for the local catch variable.
After receiving an inbound fault message, the fault handler assigns the inbound fault message to the variable before proceeding to perform the activity enclosed by the catch. Since the variable is declared within a fault handler, it is not accessible outside of the fault handler much like a local variable is not accessible outside of its declaring scope.