Throw and Catch Error Events

An error event attached to a task boundary can be set to catch any error, or errors generated by the task to which it is attached.

Example:

• when attached to a web service task, you can configure the catch error event to catch any WSDL fault associated with the web service operation that is invoked by the service task.
• when attached to an email service task, you can configure the catch error event to catch emails when the email server is unavailable:

  

When attached to a call sub-process activity or an embedded sub-process task, the event can catch errors thrown by any of the following events:

• Activities within the sub-process
• End error events
• Process interface error events (if the call sub-process activity references a process interface rather than a process)
• Any other error throwing activity executed within the sub-process (including its sub-process tasks). This includes activities whose errors cannot be caught directly by attaching the error event.