Seeking help implementing Dax - DriveTime

Hi Gwin,

As the error message prompted, in DATEDIFF function, the start date cannot be greater than the end date. 

Syntax: DATEDIFF(<start_date>, <end_date>, <interval>)

So, please make a little modification to your formula:

DriveTime 2 = 
VAR DT =
    DATEDIFF (
        MAX ( Driving[Check In] ),
        MAXX (
            FILTER (
                ALLSELECTED ( Driving ),
                Driving[ID User] = MAX ( Driving[ID User] )
                    && Driving[Check Out] < MAX ( Driving[Check In] )
            ),
            Driving[Check Out]
        ),
        
        DAY
    )
VAR DM =
    DATEDIFF (
        MAX ( Driving[Check In] ),
        MAXX (
            FILTER (
                ALLSELECTED ( Driving ),
                Driving[ID User] = MAX ( Driving[ID User] )
                    && Driving[Check Out] < MAX ( Driving[Check In] )
            ),
            Driving[Check Out]
        ),
        
        MINUTE
    )
RETURN
    IF ( DT = 0, DM, BLANK () )

Best regards,
Yuliana Gu