Calculation (non-reference)

[Ben Ball]

I have a calculation field = X - Y

I have checked the box for:

"do not evaluate if all reference fields are empty"

However the field will still calculate if only one field is entered with a value.

How can I stop the calc working if only one field is entered?

Ben

[IdealData]

How about

Case (IsEmpty (X) OR IsEmpty(Y); ""; X - Y)

[Ben Ball]

Ummm as easy as that... Thanks works perfect.