What to write in the expression while testing a CDT in an expression rule......

AFAIK, it cannot be tested in the expression shown. Assuming CDT's have values, this can be tested, by calling this exp. rule via interface rule, or say a textbox to see if any values are fetched from DB.

AFAIK, it cannot be tested in the expression shown. Assuming CDT's have values, this can be tested, by calling this exp. rule via interface rule, or say a textbox to see if any values are fetched from DB.