I'm a newbie, but I believe that the ISNULL() function is only for checking if a field contains a null.  

In fact, there is a way to do this but it's really ugly.

When passing the value to the variable, check for null there, as this is a field from which the value is being pulled. Then if isnull(fieldValue) variable:= '1/1/1800' else variable := fieldValue.

Then it's a matter of checking the variable for this dummy date. If date is 1/1/1800, then it's actually null.  !Ugly neh!

Is there a 'correct' more elegant way this can be done in Crystal? Surely you can test a variable for null! Can't you? no?

Thanks for any help on this.