Try Branch
The Try-Catch activity contains two branches by default: a 
try branch and a catch branch. The activities in the try branch will be performed unless an error is encountered. If an error occurs, the catch branch will take over.
To configure this branch
- Add the Try-Catch activity to your workflow definition by dragging it from the Toolbox Pane and dropping it in the Designer Pane.
- Drag and drop activities into this branch.