Hi Barry,
Each row in the sheet is a different problem to be solved, isn't it?
You can run Solver automatically multiple times using a macro. First you
need to set a reference to it in the vba editor: menu Tools References,
select 'Solver'.
Then use code similar to:

'-------------------------------------------
Sub solveAll()
Dim cellChange As Range
Dim cellGoal As Range
Dim cellConstraint As Range

Set cellChange = ActiveSheet.Range("A2:B2")
Set cellGoal = ActiveSheet.Range("d2")
Set cellConstraint = ActiveSheet.Range("c2")

Do '********* LOOP & SOLVE ***************
SolverReset
SolverOptions Precision:=0.001
SolverOK SetCell:=cellGoal.Address(True, True), _
MaxMinVal:=1, ByChange:=cellChange.Address(True, True)
SolverAdd CellRef:=cellConstraint.Address(True, True), _
Relation:=1, FormulaText:=100
Solver.SolverSolve UserFinish:=True

Set cellChange = cellChange.Offset(1, 0)
Set cellGoal = cellGoal.Offset(1, 0)
Set cellConstraint = cellConstraint.Offset(1, 0)

Loop While Trim(cellGoal.Text) < "" 'until goal cell is empty
End Sub
'---------------------------------------------

Regards,
Sébastien

"Barry T" wrote:

Is there a way to use dummy indices in macros in order to invoke Solver
multiple times? I want to solve for the value in column D by changing the
values in columns A and B, based on the value in Column C being constrained.
Rather than having cell references be definitive (i.e. "$A$1"), I want to put
the solver functions in a loop (An), where n varies up to 800, so that I can
invoke solver on 800 lines of data.