SteveM,

I don't think I have explained my problem sufficiently well.

Solver requires a target cell (which has the value of the objective
function - normally calculated by a formula within the cell) and
changing cells (which are the variables to be optimised). The only way
I can define my objective function is through a macro. Therefore the
value in the target cell must be provided by my Macro and not a formula
in the cell. To provide the value in the target cell the macro reads the
values of the changing cells (optimisation variables) and runs the
macro.

Solver requires the target cell to contain a formula, which is probably
the first indication that I can't use a macro instead of a formula in
the target cell. Can Solver or an alternative code or add-in work with
an objective function calculated by a macro and not by a fromula in the
target cell?

Hope this make sense?

Regards,

Will


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