Hi Wenyu ,
your expression needs to be corrected little
Are you trying to compare between the object and the variable ?
If yes ,you did not used any object in the expression.
Help me to understand your requirement , I can guide you through the right expression
Retrieve Lists:
Create Helper Entities:
Loop Through TableList:
CurrentTable
Inside Loop:
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not(any($ReserveList[Table = $CurrentTable and StartTime <= $StartTime and EndTime >= $StartTime]))
True Path of Decision:
CurrentTable
After Loop:
$TableHelper/AvailableTables = $AvailableTableList