making an attribute of type date "blank" using a report

Hi,

i have created two attributes as below:

1)mergeDate of type "Date"  2)mergeTime of type "Time"

i want to make these two attributes blank through script but the below statement returns false.

objects[i].Attribute(mergeTime,lang).setValue("");

i think the date attribute will accept values only in date format.

is this correct? can somebody guide me please?

i am working on Aris 7.1