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  • Overview
    • Introduction to UiPath Maestro™
    • Requirements
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  • Process modeling
  • BPMN
  • Process implementation
  • Process operations
  • Process monitoring
  • Process optimization
  • Reference information
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Maestro user guide

Last updated Jun 23, 2025

Boundary events

Boundary events are attached to tasks or sub-processes to model interruptions or timeouts.

Event typeBehavior
Interrupting timerUsed for manual starts or when the trigger is defined outside the BPMN model.
Interrupting errorIndicates the process is triggered by an incoming message. Often used in called processes.
EscalationIndicates the process starts at a specific time or after a delay. Useful for scheduled operations.
Important: Use boundary events to represent expected exceptions or alternate flows. Place them visually on the edge of the task they monitor.

For more details about the BPMN elements supported in Maestro, see BPMN support.

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