If you use datetime values, everything is so much simpler.

>Is there a better way to find max vale between variables ?
>
>I did as below, but I not sure it's the best way
>
>*********************
>
> DO case
> CASE tMinutos1 > tMinutos2 .and. tMinutos1 > tMinutos2
>
> myMaxValue = tMinutos1
>
> CASE tMinutos2 > tMinutos1 .and. tMinutos2 > tMinutos3
>
> myMaxValue = tMinutos2
>
> CASE tMinutos3 > tMinutos1 .and. tMinutos3 > tMinutos2
>
> myMaxValue = tMinutos3
>
> OTHERWISE
> endcase
>***********************