[Couenne] AMPL error

[Pietro Belotti]

Ina,

if you are using AMPL, you can add the option

option halt_on_ampl_error yes;

before issuing the command "solve;".

Most likely, though, it is an evaluation error that does NOT affect the 
behaviour of Couenne as it is related to Ipopt, the nonlinear solver used 
by Couenne to find a local minimum. Couenne does not stop execution after 
encountering such an error and should be able to find an optimal solution 
anyway.

Hope this helps.

Regards,
Pietro

--
Pietro Belotti
Dept. of Mathematical Sciences
Clemson University
email: pbelott at clemson.edu
phone: 864-656-6765
web:   http://myweb.clemson.edu/~pbelott

On Sat, 17 Nov 2012, Liffey1986 at gmx.de wrote:

> Dear all,
>
> I'm a beginner in using Couenne and tried to solve some library-instances with Couenne.
> For some instances I always get the error message "Error in an AMPL evaluation" Run with "halt_on_ampl_error yes" to see details.
>
> I don't understand to which file I should add "halt_on_ampl_error yes" to get the details?!
>
> Regards
> Ina
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