Add a Try-Catch Action

You add a Try-Catch action to gracefully handle errors and avoid program crashes.

To use a Try-Catch action:

1. Add the action in one of three ways, as explained at the end of Built-In Actions.
2. To change the alias for the error object, which has the name and message properties, select the Catch block on the canvas and change the alias in the Properties pane:
   
   
   Description of the illustration jsac-try-catch-error-alias.png
   
   
3. To add an action to a Try-Catch block, select the block and double-click the action in the Actions palette, or drag an action from the Action's palette onto the desired block:
   
   
   Description of the illustration jsac-try-catch-example.png
   
   

You can also surround an action with a Try-Catch action by right-clicking it and selecting Surround with Try-Catch:

Description of the illustration jsac-surround-try-catch.png

If you need a Finally block, drag the first action that you want to add to the block over the Try-Catch action and drop it into the Create Finally area that appears:

Description of the illustration jsac-create-finally-block.png