[Ipopt] IPOPT violated constraints

[Seth Watts]

Hello Novalio -

Although there may be a more elegant solution that someone more familiar
with IPOPT may be able to give you, a simple solution would be to have your
finalize_solution method call your eval_g method, then either display all
the constraint functions' values, or else only those which violate their
bounds (in the case of many constraints).

I use this approach in my use of IPOPT, which optimizes the design of a
structure. The constraint functions have direct physical meaning, so seeing
their values when the optimization terminates (either at a feasible or
infeasible point) gives useful information about the structure.

Hope this is helpful.

- Seth


On Sat, May 18, 2013 at 1:49 AM, Novalio Daratha <novatha at gmail.com> wrote:

>
>  Dear All,
>
>  I am using IPOPT via AMPL and get the following message:
>
>  EXIT: Converged to a point of local infeasibility. Problem may be
> infeasible.
>
>  Is there any way to know which constraints are violated?
>
>  thanking you,
>
>  Novalio Daratha
>
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