To calculate the value using MAX

Hi All,
In my output table i have value Time of TYPE P.
I want to get the maximum value from the time coloum.
I have tried using the MAX function like Max(ws_output-time)
but gettting error.
Can someone please guide the step need to be taken to get the output max value from the workarea(ws_output) field (time)
Thanks in advance..
Regards,
Chirag

say time field is T1 type sy-uzeit in your internal table .
SORT ITAB by T1 descending .
read table itab index 1 . " this places the time value of the max in the 1st row.
itab-t1 holds max value .

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Please let me know if this helps.
Thanks,
Bogdan

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To calculate the value using MAX

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