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