Connecting GAMS 28.1.0 to neos server

Problems with modeling
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abb.omidi
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Connecting GAMS 28.1.0 to neos server

Post by abb.omidi » 2 weeks ago

Dear support team,

I'm trying to run the GAMS model using neos-server. I wrote the following code in the GAMS studio:

Code: Select all

Option mip=kestrel;
sequence.optfile=1;
$onecho > kestrel.opt
kestrel_solver cplex
neos_server    www.neos-server.org:3333
$offecho
But it doesn't work. I was wondering if, how can I connect GAMS and neos-server?

Regards
Omidi. A

Fred
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Joined: 2 years ago

Re: Connecting GAMS 28.1.0 to neos server

Post by Fred » 1 week ago

Hi,

To help you it would be good to know how exactly your code fails (share log, lst and files to reproduce). If I adopt your code snippet to model from the model library, everything works as expected.

Best,
Fred

abb.omidi
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Re: Connecting GAMS 28.1.0 to neos server

Post by abb.omidi » 5 days ago

Dear Fred,

Thanks for your comment. I was trying to solve the attached example using GAMS/Kestrel via GAMS studio 28.1.0.
When I solve the model log file is as follows:

Code: Select all

--- Job GAMS..Kestrel.gms Start 08/20/19 10:29:58 28.1.0 r5b48834 WEX-WEI x86 64bit/MS Windows
--- GAMS Parameters defined
    Input C:\Users\A.Omidi\Documents\GAMSStudio\workspace\GAMS..Kestrel.gms
    PageSize 0
    ScrDir C:\Users\A.Omidi\Documents\GAMSStudio\workspace\225a\
    SysDir C:\GAMS\win64\28.1\
    LogOption 3
    ErrMsg 1
    ErrorLog 99
    IDE 1
    LstTitleLeftAligned 1
GAMS 28.1.0   Copyright (C) 1987-2019 GAMS Development. All rights reserved
Licensee: GAMS Development Corporation, USA              G871201/0000CA-ANY
          Free Demo, +1 202-342-0180, support@gams.com, www.gams.com DC0000
--- Starting compilation
--- GAMS..Kestrel.gms(43) 3 Mb
--- Starting execution: elapsed 0:00:00.068
--- GAMS..Kestrel.gms(38) 4 Mb
*** Status: Normal completion
--- Job GAMS..Kestrel.gms Stop 08/20/19 10:29:58 elapsed 0:00:00.101
It seems that the model is solved but, I can not access to the solution or solver log file.
Would you please, say that how can I fix it?

Regards
Abbas
Attachments
GAMS..Kestrel.gms
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ALe
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Re: Connecting GAMS 28.1.0 to neos server

Post by ALe » 5 days ago

Try adding a solve statement at the bottom; I tried the following and it worked here:

Code: Select all

solve sequence min totwait using mip;

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