Catch Exception Block
The Catch Exception block represents an exception handler, and is attached to the end of a Scope shape. You can attach as many Catch Exception blocks as you need. If an exception is thrown that matches the type specified, the exception handler will be called. If some other exception is thrown, it will be handled by the default exception handler.
To do this
Exception Object Name property
Type a name for the exception.
Exception Object Type property
From the drop-down list, select an exception type consisting of either a fault message or an object derived from the class System.Exception.
Report to Analyst property
Select True if you want to make this shape viewable in the Visual Business Analyst Tool.