Intervals for DEC domains

Hi,

I have a domain of DEC data type. I want to set the valid interval for this DEC from 0 to 59.99. How to do it?

I have tried to simply type "0" and "59.99" in the "Intervals" section in the "Value Range" tab, but the system prevented me to do so. It showed a message saying "fixed value/limit for data type dec must be a whole positive number".

Regards,

Haris