Ignoring dual and getting feasible solution

[bharswami]

I am using IPOPT for MATLAB (OptiToolbox). I am interested in only feasible solutions, so I make the objective function a constant and run the solver. But I find that IPOPT is still trying to get a dual feasible solution. Is there a way to make the solver ignore the dual problem completely? I tried setting a large dual_inf_tol but even that didn't help. Please suggest ideas.
Regards

[svigerske]

Try setting tol and compl_inf_tol to large values, too.
tol is the max of primal infeas, dual infeasibility, and complementarity violation in the scaled problem.

[bharswami]

Worked out. Thanks.

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On Mon, Oct 4, 2021 at 5:48 PM Stefan Vigerske ***@***.***> wrote: Try setting tol and compl_inf_tol to large values, too. tol is the max of primal infeas, dual infeasibility, and complementarity violation in the scaled problem. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#520 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AHHO5AJSCJB4XGHRX5BBL3DUFGLR7ANCNFSM5FGL4IEQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[bharswami]

Of course needed to set constr_viol_tol and acceptable_constr_viol_tol also. Also, the substitute for ‘tol’ in OptiToolbox is acceptable_tol. On Wed, Oct 6, 2021 at 5:27 AM Bharath ae15d019 ***@***.***> wrote:

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Worked out. Thanks. On Mon, Oct 4, 2021 at 5:48 PM Stefan Vigerske ***@***.***> wrote: > Try setting tol and compl_inf_tol to large values, too. > tol is the max of primal infeas, dual infeasibility, and complementarity > violation in the scaled problem. > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub > <#520 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AHHO5AJSCJB4XGHRX5BBL3DUFGLR7ANCNFSM5FGL4IEQ> > . > Triage notifications on the go with GitHub Mobile for iOS > <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> > or Android > <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. > >