[Couenne] Couenne_Optimal_point

[Pietro Belotti]

Dear Ehsan,

> If I have a MINLP, and  i want to  find the optimal value as well as  
> the point(optimal point) at  which the objective function achieves  
> optimal value then  is there any way to do it in Couenne.

Couenne, for now, accepts instances through AMPL. After solving the  
problem stored in the file /my/directory/problem.nl, The AMPL  
interface stores a text file /my/directory/problem.sol with an optimal  
solution. This format is readable from AMPL, and I don't know if other  
programs can read it. However, if you know the number of variables n,  
it seems that the last n lines of that .sol file contain the optimal  
solution. As I said, I don't know if this works all the time and if  
this is the official way to read a .sol file.

Hope this helps.

Regards,
Pietro



_________________________________________
Pietro Belotti, Lehigh University
Dept. of Industrial and Systems Engineering
200 W Packer Ave, Bethlehem PA 18015.
phone: 610-758-3865   fax: 610-758-4886
email: belotti at lehigh.edu
web:   http://www.lehigh.edu/~pib208


On 07/05/2010, ehsan ullah <ehsanmath at yahoo.com> wrote:

> Dear Couenne Team
> I have  just  started using  Couenne. I am writing you  to as just a  
> short question.
> If I have a MINLP, and  i want to  find the optimal value as well as  
> the point(optimal point) at  which the objective function achieves  
> optimal value then  is there any way to do it in Couenne.
> I am running Couenne with command line and i get only the value of  
> objective function.
> I shall be thankful for reply
> thanks in  advance
> Ehsan Ullah
> PhD  student
> Lehrstuhl für Symbolic Computation
> Passau Universität
> Germany
> Ph# 0049-851-2016296
> Mobile: 0049-176-45196854
> Email: ehsanmath at yahoo.com
>
>
>



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