thanks Mike

i found what you said
guess i should try the other versions


"Mike Middleton" wrote:

Alonso -

15 rows times 21 columns = 315 cells

The standard Solver included with Excel has a limit of 200 adjustable cells.

To verify, search Excel Help for "specifications and limits."

For more powerful versions of Solver, browse to www.solver.com

- Mike Middleton
http://www.DecisionToolworks.com
Decision Analysis Add-ins for Excel