[Ipopt] Cutting back alpha due to evaluation error

[Stefan Vigerske]

Hi,

> Hi,
>
> thanks for the information.
>
>> It seems you are using GAMS.  If you however also have an AMPL model, you can set the option
>>
>> halt_on_ampl_error yes
>>
>> from within AMPL (ipopt_options... it will not work from ipopt.opt).  Then AMPL will stop in case of an evaluation error and tell you which constraint is causing the trouble.
>
> @Stefan: Isn't that something that would be nice in the GAMS interface, too? ;-)

I think if you set the domain violation limit of Gams/Ipopt to 1 
(domlim=1), then it should also stop around the point where it got into 
trouble. I forgot about this feature :-).

Stefan

>
> Best regards,
> Martin
>
>
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-- 
Stefan Vigerske
Humboldt University Berlin, Numerical Mathematics
http://www.math.hu-berlin.de/~stefan