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Entering Level 1 Node POS Interface MonitorPOS Interface MonitorLeaving Level 1 Node POS Interface Monitor
   Entering Level 2 Node Error/Exception ProcessingError/Exception ProcessingLeaving Level 2 Node Error/Exception Processing
   Entering Level 2 Node Workflow in the POS Interface MonitorWorkflow in the POS Interface MonitorLeaving Level 2 Node Workflow in the POS Interface Monitor
   Entering Level 2 Node Application and Workflow Interaction in the POS MonitorApplication and Workflow Interaction in the POS MonitorLeaving Level 2 Node Application and Workflow Interaction in the POS Monitor