I use very often the onboard solver of EXCEL (grg nonlinear) and I am quite happy with its performance. Since I use the data generated by the solver for further calculations I would like to knwo the machine epsilon (error of my result). Is there a way of estimating it or does the solver reports it and I have not been able to find it in the reports?

The formulae which I minimize by altering R_18 is


All other quantities are known.

  • Are you talking about reports appears in the Reports box of the Solver Results dialog box ? Commented Aug 15, 2019 at 9:59
  • Yes, I mea these reports. They do not really help me.
    – Zorg
    Commented Aug 15, 2019 at 10:01
  • could you please specify that what error/problem you are finding while simplify it? Commented Aug 15, 2019 at 10:08
  • I am not finding an error, I am interessted in the error the algoritm (or solver routine) produces by rounding and so on.
    – Zorg
    Commented Aug 20, 2019 at 6:28


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