Standard Excel Solver - Messages in the Solver Results Dialog (11-13)

Messages in the Solver Results Dialog (11-13)

There is not enough memory available to solve the problem. (11)

This message appears when the Solver could not allocate the memory it needs to solve the problem. Given the problem size limits of the standard Microsoft Excel Solver, this message is only likely to appear if you have too many workbooks open in Excel or if you have too many open applications besides Excel. Close these workbooks or applications and try again.

Another Excel instance is using SOLVER.DLL. Try again later. (12)

This message should not appear in modern versions of Microsoft Excel and Microsoft Windows.  It originally appeared because it wasn't possible to solve problems simultaneously by running more than one instance of Microsoft Excel.

Error in model. Please verify that all cells and constraints are valid. (13)

This message means that the internal "model" (information about the adjustable cells, target cell, constraints, Solver options, etc.) which is created by the Solver.xla add-in and passed to Solver32.dll is not in a valid form. You might receive this message if you are using the wrong version of either Solver.xla or Solver32.dll, or if you have accidentally modified the values of certain hidden defined names used by the Solver, either interactively or in a VBA program. To guard against this possibility, you should avoid using any defined names beginning with "solver" in your own application.

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