Circular Dependency

dmbd1904 , Try like. I am assuming you are creating a new column

Standing Time = VAR Location = COR_DepthRelatedExploratoryInformation[LocationDetails]
VAR Startdate = COR_DepthRelatedExploratoryInformation[DateTimeStart]
VAR Enddate = COR_DepthRelatedExploratoryInformation[DateTimeEnd]
RETURN CALCULATE(SUM(COR_TimeRelatedRemarksLocation[Working Hour Duration]),Filter(COR_TimeRelatedRemarksLocation ,COR_ProgressByTime[LocationDetails]=Location && COR_TimeRelatedRemarksLocation[DateTimeStart]>=Startdate && COR_TimeRelatedRemarksLocation[DateTimeEnd]<=Enddate) )