52.16.2 Failure Handling Section

Abort: This property determines under what conditions the activity will be aborted.

Disabled: The activity will execute as long as it takes to complete.

On Timeout: The activity will be aborted after a fixed period of time, unless it has already completed before that time. What you indicate here is thus a maximum duration for the activity.

On Event: The activity will be aborted if and when one of the specified events occurs; otherwise it will run to completion.

On Timeout and/or Event: Select this to create a more complex abort condition in the form of a boolean expression combining On Timeout and On Event criteria as defined above. Additional fields Condition 1, Operator (AND/OR), and Condition 2 appear for defining the boolean expression, which can be expanded recursively.

Note that this property is also possessed by the root activity, in which case it applies to the entire script.
Compare the "Terminate" activity, which aborts the whole script with immediate effect.

On Failure: This property determines what will happen if an activity fails (when first attempted).

Stop Script Execution: If an activity fails, the activity is abandoned, and the whole script is terminated.

Continue Script Execution: If an activity fails, the activity is abandoned, and the execution proceeds to the next activity in the workflow branch in question.

Retry: If an activity fails, it will be retried. When you choose this option, a set of further parameters appear: Retries – the number of retries; Delay – the time to wait before each retry; On Failure – what action to take if all retries fail (continue or stop script).