** ERROR 129048 ** Node node number specified as the trigger location for valve gate no. valve gate number with flow front or pressure control does not exist. Please use Query Entities in the Modeling menu to determine the correct node number, correct the valve gate settings, then rerun the analysis.
You have selected valve gate control by flow front or pressure, and entered an invalid node number as the trigger location.
Determine the correct node number using Modeling Query Entities, then edit the valve gate controller properties of the relevant valve gate.