Please Note. ARRAYVAL has been deprecated and is longer supported in ExceLab 7.0 and later versions. You can now define arbitrary formula constraints on a result array by simply referencing
any value or range of values in the array result in your constraint formulas by using DYNVAL.
DYNVAL is a dummy function that simply returns the value of
its argument but in an optimization context, it ensures that its argument is dynamically evaluated during the optimization.