optimal solution reduced gradient less than tolerance (Conopt3 solver)

GAMS
1

Hello,

I have to solve a NLP Optimization problem and I use Conopt3 solver.

My solver give to me a solution which has this message:

optimal solution reduced gradient less than tolerance.

From what I found in conopt’s tutorial I can not understand why this happens. Any idea? How I can solve this problem?

Thanks a lot

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2

Saosan



What were you hoping for? If you want something better than “optimal” then you should be in a different business.



Regards



Arne Stolbjerg Drud


\

Arne Stolbjerg Drud

ARKI Consulting & Development A/S

Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark

Phone: (+45) 44 49 03 23, Fax: (+45) 44 49 03 33, email: adrud@arki.dk



From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of saosan
Sent: Saturday, September 14, 2013 9:14 PM
To: gamsworld@googlegroups.com
Subject: optimal solution reduced gradient less than tolerance (Conopt3 solver)



Hello,


I have to solve a NLP Optimization problem and I use Conopt3 solver.



My solver give to me a solution which has this message:

optimal solution reduced gradient less than tolerance.

From what I found in conopt’s tutorial I can not understand why this happens. Any idea? How I can solve this problem?



Thanks a lot

–
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3

Reply-to: gamsworld@googlegroups.com

I want to inform me if there is any problem in my optimal solution if this message appeared.

Best Regards

Τη Δευτέρα, 16 Σεπτεμβρίου 2013 10:36:41 π.μ. UTC+3, ο χρήστης Arne Stolbjerg Drud έγραψε:

Saosan



What were you hoping for? If you want something better than “optimal” then you should be in a different business.



Regards



Arne Stolbjerg Drud


\

Arne Stolbjerg Drud

ARKI Consulting & Development A/S

Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark

Phone: (+45) 44 49 03 23, Fax: (+45) 44 49 03 33, email: ad…@arki.dk



From: gams...@googlegroups.com [mailto:gams...@googlegroups.com] On Behalf Of saosan
Sent: Saturday, September 14, 2013 9:14 PM
To: gams...@googlegroups.com
Subject: optimal solution reduced gradient less than tolerance (Conopt3 solver)



Hello,


I have to solve a NLP Optimization problem and I use Conopt3 solver.



My solver give to me a solution which has this message:

optimal solution reduced gradient less than tolerance.

From what I found in conopt’s tutorial I can not understand why this happens. Any idea? How I can solve this problem?



Thanks a lot

–
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+...@googlegroups.com.
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4

saosan, its just means the solver’s finishing critera is being accomplished. Most probably it means you found an optimal solution.

regards
Claudio
El sep 16, 2013 5:35 a.m., “saosan” escribió:

I want to inform me if there is any problem in my optimal solution if this message appeared.

Best Regards

Τη Δευτέρα, 16 Σεπτεμβρίου 2013 10:36:41 π.μ. UTC+3, ο χρήστης Arne Stolbjerg Drud έγραψε:

Saosan



What were you hoping for? If you want something better than “optimal” then you should be in a different business.



Regards



Arne Stolbjerg Drud


\

Arne Stolbjerg Drud

ARKI Consulting & Development A/S

Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark

Phone: (+45) 44 49 03 23, Fax: (+45) 44 49 03 33, email: ad…@arki.dk



From: gams...@googlegroups.com [mailto:gams...@googlegroups.com] On Behalf Of saosan
Sent: Saturday, September 14, 2013 9:14 PM
To: gams...@googlegroups.com
Subject: optimal solution reduced gradient less than tolerance (Conopt3 solver)



Hello,


I have to solve a NLP Optimization problem and I use Conopt3 solver.



My solver give to me a solution which has this message:

optimal solution reduced gradient less than tolerance.

From what I found in conopt’s tutorial I can not understand why this happens. Any idea? How I can solve this problem?



Thanks a lot

–
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5

Thank both of you for your reply

Τη Δευτέρα, 16 Σεπτεμβρίου 2013 11:46:22 μ.μ. UTC+3, ο χρήστης Claudio Delpino έγραψε:

saosan, its just means the solver’s finishing critera is being accomplished. Most probably it means you found an optimal solution.

regards
Claudio
El sep 16, 2013 5:35 a.m., “saosan” escribió:

I want to inform me if there is any problem in my optimal solution if this message appeared.

Best Regards

Τη Δευτέρα, 16 Σεπτεμβρίου 2013 10:36:41 π.μ. UTC+3, ο χρήστης Arne Stolbjerg Drud έγραψε:

Saosan



What were you hoping for? If you want something better than “optimal” then you should be in a different business.



Regards



Arne Stolbjerg Drud


\

Arne Stolbjerg Drud

ARKI Consulting & Development A/S

Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark

Phone: (+45) 44 49 03 23, Fax: (+45) 44 49 03 33, email: ad…@arki.dk



From: gams...@googlegroups.com [mailto:gams...@googlegroups.com] On Behalf Of saosan
Sent: Saturday, September 14, 2013 9:14 PM
To: gams...@googlegroups.com
Subject: optimal solution reduced gradient less than tolerance (Conopt3 solver)



Hello,


I have to solve a NLP Optimization problem and I use Conopt3 solver.



My solver give to me a solution which has this message:

optimal solution reduced gradient less than tolerance.

From what I found in conopt’s tutorial I can not understand why this happens. Any idea? How I can solve this problem?



Thanks a lot

–
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