Set a date attribute to blank

Hello again guys,

I am trying to overwrite the existing value of a date attribute with a blank value (an empty string): ""

I made sure that "" (an empty string) is the value when the existing attribute is blank by using a getValue command; however when I try to do the reverse action and set the value to "", I receive a false feedback and the previous value remains untouched.

Please help.

Thanks,

Herman