Error while using SBB CONOPT 3

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Archiver
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Error while using SBB CONOPT 3

Post by Archiver » 1 year ago


Hello friends,

I am receiving following error while running my MINLP code with SBB Conopt3 solver. Can anybody help me to understand this error and resolve this to proceed further?


Thanks in advance

Parul

The model has 97225 variables and 284755 constraints
with 402400 Jacobian elements, 480 of which are nonlinear.
The Hessian of the Lagrangian has 432 elements on the diagonal,
24 elements below the diagonal, and 480 nonlinear variables.

** Optimal solution. The error in the optimal objective function value
value estimated from the reduced gradient and the estimated
Hessian is less than the minimal tolerance on the objective.


CONOPT time Total 148.369 seconds
of which: Function evaluations 0.524 = 0.4%
1st Derivative evaluations 0.164 = 0.1%
2nd Derivative evaluations 0.701 = 0.5%
Directional 2nd Derivative 1.126 = 0.8%

*** gevCallSolver failed:
Solve failed (conopt,RMINLP,sl=5)

No solution returned

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Archiver
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Posts: 7876
Joined: 1 year ago

Re: Error while using SBB CONOPT 3

Post by Archiver » 1 year ago


Parul,

This looks like a known bug which will be fixed with the next release. As a workaround it should help to set the SBB option

loglevel 0

Best regards,
Lutz



On 3/30/2016 6:22 AM, parul mathuria wrote:
> Hello friends,
>
> I am receiving following error while running my MINLP code with SBB
> Conopt3 solver. Can anybody help me to understand this error and resolve
> this to proceed further?
>
>
> Thanks in advance
>
> Parul
>
> The model has 97225 variables and 284755 constraints
> with 402400 Jacobian elements, 480 of which are nonlinear.
> The Hessian of the Lagrangian has 432 elements on the diagonal,
> 24 elements below the diagonal, and 480 nonlinear variables.
> ** Optimal solution. The error in the optimal objective function value
> value estimated from the reduced gradient and the estimated
> Hessian is less than the minimal tolerance on the objective.
> CONOPT time Total 148.369 seconds
> of which: Function evaluations 0.524 = 0.4%
> 1st Derivative evaluations 0.164 = 0.1%
> 2nd Derivative evaluations 0.701 = 0.5%
> Directional 2nd Derivative 1.126 = 0.8%
> *** gevCallSolver failed:
> Solve failed (conopt,RMINLP,sl=5)
>
> No solution returned
>
> --
>
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> .
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> .
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> For more options, visit https://groups.google.com/d/optout.


--
Lutz Westermann LWestermann@gams.com
GAMS Development Corporation GAMS Software GmbH
1217 Potomac St. NW, P.O. Box 40 59
Washington DC, 20007, USA 50216 Frechen, Germany
Fon/Fax: +1 202 342-0180/1 Fon/Fax: +49 221 949-9170/1
http://www.gams.com

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