Exit Status: Restoration Failed (What does this mean?)

[sir-avinash]

Hi Ayonga,

I get this exit status (Restoration Failed) for some of my optimization trials. Can you help me understand what that means? I pasted my optimization report below for reference.

Thanks!

Optimization Report:

Number of Iterations....: 84

                               (scaled)                 (unscaled)

Objective...............: 5.1802723933401123e-08 5.1802723933401123e-08
Dual infeasibility......: 2.9379169971882279e-03 2.9379169971882279e-03
Constraint violation....: 1.7425297660075284e-01 1.7425297660075284e-01
Complementarity.........: 6.4652254579601839e-08 6.4652254579601839e-08
Overall NLP error.......: 1.7425297660075284e-01 1.7425297660075284e-01

Number of objective function evaluations = 154
Number of objective gradient evaluations = 49
Number of equality constraint evaluations = 154
Number of inequality constraint evaluations = 154
Number of equality constraint Jacobian evaluations = 87
Number of inequality constraint Jacobian evaluations = 87
Number of Lagrangian Hessian evaluations = 0
Total CPU secs in IPOPT (w/o function evaluations) = 0.724
Total CPU secs in NLP function evaluations = 9.340

**Restoration phase converged to a feasible point that is
unacceptable to the filter for the original problem.
Restoration phase in the restoration phase failed.

EXIT: Restoration Failed!**