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The Google Group GAMS World has been closed. In 2016 Google banned the group without giving us a chance to appeal. 
In the meantime we have started a different discussion platform on https://forum.gamsworld.org. We invite you to join us for
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More information about GAMS can be found on the GAMS website: www.gams.com

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Michael Bussieck

8/15/17

Google Group GAMS World has been closed

The Google Group GAMS World has been closed. In 2016 Google banned the group without giving us a

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Google Group GAMS World has been closed

The Google Group GAMS World has been closed. In 2016 Google banned the group without giving us a

8/15/17

Alireza Ahmadimanesh, … shahrzad khosravi3

8/7/17

Hi I have a same problem can you solve it? On Friday, March 18, 2016 at 11:53:02 AM UTC+3:30, Alireza

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Hi I have a same problem can you solve it? On Friday, March 18, 2016 at 11:53:02 AM UTC+3:30, Alireza

8/7/17

Saeid Abbasi Parizi, … Ali Reza Bahari3

4/29/16

Model state 8 ?!

Hi My friends Saeid and Vafa mr. saeid please set the following statements befor solve statemnet to

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Model state 8 ?!

Hi My friends Saeid and Vafa mr. saeid please set the following statements befor solve statemnet to

4/29/16

Vafa Mousavi, … Ali Reza Bahari4

4/29/16

Why give the same performance of all units

Hi Vafa Your model just compute efficiency of DMU1 many times. here is the corrected code Sets i

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Why give the same performance of all units

Hi Vafa Your model just compute efficiency of DMU1 many times. here is the corrected code Sets i

4/29/16

Lucas Ianni, … Sofia Raimundo8

4/28/16

How do I call the gams solvers with a .gms but without openning gams ? (python)

So you don't know how can I run a file .gms from python script? Em domingo, 5 de agosto de 2012

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How do I call the gams solvers with a .gms but without openning gams ? (python)

So you don't know how can I run a file .gms from python script? Em domingo, 5 de agosto de 2012

4/28/16

Abhay Lidbe, … Sofia Raimundo7

4/28/16

Just Open, Run and Exit GAMS using Python

I tryed to use this code also, but I get an error to, like this: Parsing error SyntaxError: EOL while

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Just Open, Run and Exit GAMS using Python

I tryed to use this code also, but I get an error to, like this: Parsing error SyntaxError: EOL while

4/28/16

Tino, Renger van Nieuwkoop3

4/28/16

Assigned set used as domain !

Thanks a lot!! On Thursday, April 28, 2016 at 9:03:08 AM UTC+3, Renger van Nieuwkoop wrote: Hi Tino

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Assigned set used as domain !

Thanks a lot!! On Thursday, April 28, 2016 at 9:03:08 AM UTC+3, Renger van Nieuwkoop wrote: Hi Tino

4/28/16

Sara Amr, … Renger van Nieuwkoop3

4/28/16

How to find out the default solvers used?

Hi Sara - You can see in the GAMSIDE what the available solvers are: File – Options – Solver. Those

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How to find out the default solvers used?

Hi Sara - You can see in the GAMSIDE what the available solvers are: File – Options – Solver. Those

4/28/16

Ehsan Ghorbankhani, Pedro Javier Ramírez Torrealba4

4/28/16

Dear Ehsan, I know that paper. In the GAMS website you can find information about how to define and

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Dear Ehsan, I know that paper. In the GAMS website you can find information about how to define and

4/28/16

4/28/16

Run a gams file in background with python

Hi! I'm working with ArcGis program who read python scripts. I need to run in background a gams

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Run a gams file in background with python

Hi! I'm working with ArcGis program who read python scripts. I need to run in background a gams

4/28/16

4/28/16

Variable Index when using summation

Hey I am implementing a program on IGDT which requires the summation index to be variable. I want to

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Variable Index when using summation

Hey I am implementing a program on IGDT which requires the summation index to be variable. I want to

4/28/16

Andrej Trpovski

4/28/16

Second Order Conic Programming

I am doing an optimization on a grid. I am using a second order conic programming. I am programming

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Second Order Conic Programming

I am doing an optimization on a grid. I am using a second order conic programming. I am programming

4/28/16

4/27/16

Dear Gamsworld people, I am looking for formulations written in GAMS. I am talking about formulations

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Dear Gamsworld people, I am looking for formulations written in GAMS. I am talking about formulations

4/27/16

Vegard Skonseng Bjerketvedt, Michael Ferris3

4/27/16

Nash-Cournot(mcp) to Stackelber(mpec), same output.

Thanks Michal. fredag 22. april 2016 19.40.23 UTC+2 skrev Michael Ferris følgende: Attached is a

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Nash-Cournot(mcp) to Stackelber(mpec), same output.

Thanks Michal. fredag 22. april 2016 19.40.23 UTC+2 skrev Michael Ferris følgende: Attached is a

4/27/16

IdanL, Rustam Otarov2

4/27/16

GAMS/MPSGE - modelling a windfall shock and a sovereign fund

Hi Idan, Can you help on modelling sovereign fund? I would greatly appreciate that. Rustam On Monday,

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GAMS/MPSGE - modelling a windfall shock and a sovereign fund

Hi Idan, Can you help on modelling sovereign fund? I would greatly appreciate that. Rustam On Monday,

4/27/16

KAZI SOHAG, Rustam Otarov2

4/27/16

Template of Carbon Tax

Dear Sohag, Have found a template? I would greatly appreciate if you could share it with me. Best,

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Template of Carbon Tax

Dear Sohag, Have found a template? I would greatly appreciate if you could share it with me. Best,

4/27/16

Renger van Nieuwkoop, Frank Ward2

4/26/16

RE: Capstone Project with GAMS

Dear Filiz, Try minimizing the total cost of meeting the menu requirements, ie putting a lower bound

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RE: Capstone Project with GAMS

Dear Filiz, Try minimizing the total cost of meeting the menu requirements, ie putting a lower bound

4/26/16

4/25/16

Couenne Solver - MINLP

Hi, guys I am using COUENNE to solve a MINLP model (non-convex) using GAMS but it reach to a feasible

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Couenne Solver - MINLP

Hi, guys I am using COUENNE to solve a MINLP model (non-convex) using GAMS but it reach to a feasible

4/25/16

4/23/16

Insert binary table from excel file

Hello everyone, I am trying to insert a binary table data in my gams model using an excel sheet. This

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Insert binary table from excel file

Hello everyone, I am trying to insert a binary table data in my gams model using an excel sheet. This

4/23/16

Vegard Skonseng Bjerketvedt

4/22/16

Nash-Cournot(mcp) ----> Stackelberg(mpec), still Nash-Cournot output.

Trying to extend my Nash-Cournot model (mcp) to a Stackelber model (mpec). In my Stackelberg model

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Nash-Cournot(mcp) ----> Stackelberg(mpec), still Nash-Cournot output.

Trying to extend my Nash-Cournot model (mcp) to a Stackelber model (mpec). In my Stackelberg model

4/22/16

4/22/16

big M problem with binary variable

This is my model. Equations condition_1 , condition_2, condition_3 accordingly refer to the bigM

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big M problem with binary variable

This is my model. Equations condition_1 , condition_2, condition_3 accordingly refer to the bigM

4/22/16

RCC, Renger van Nieuwkoop2

4/21/16

121,148,171 errors

Hi ??? It is really getting annoying: If you write to this forum, have the courtesy to put your name

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121,148,171 errors

Hi ??? It is really getting annoying: If you write to this forum, have the courtesy to put your name

4/21/16

AB, Steven Dirkse3

4/21/16

Help with an error message: FUNC DOMAIN: x**y, x<0

AB, This link should give you a good idea why your change works as it does. https://support.gams.com/

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Help with an error message: FUNC DOMAIN: x**y, x<0

AB, This link should give you a good idea why your change works as it does. https://support.gams.com/

4/21/16

lkc...@163.com, Renger van Nieuwkoop10

4/21/16

When solve Stackelberg problems with MPEC type, shows 1 error that "571 rows 599 columns 12094 non-zeroes 13372 nl-code 9947 nl-non-zeros "

Hi Renger: It's ok, thanks anyway. LK At 2016-04-21 17:31:41, "Renger van Nieuwkoop"

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When solve Stackelberg problems with MPEC type, shows 1 error that "571 rows 599 columns 12094 non-zeroes 13372 nl-code 9947 nl-non-zeros "

Hi Renger: It's ok, thanks anyway. LK At 2016-04-21 17:31:41, "Renger van Nieuwkoop"

4/21/16

4/21/16

Issue with Bounds: Unbounded solution. PLEASE HELP!!!

Hello All, I am trying to maximize my objective function which is equation E4. When i place the lower

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Issue with Bounds: Unbounded solution. PLEASE HELP!!!

Hello All, I am trying to maximize my objective function which is equation E4. When i place the lower

4/21/16

Bruno Hannud, … Frank Ward11

4/20/16

Help with Endogenous Relational Operations Error

Thank you Frank. Sent with Unibox On Apr 19, 2016, at 11:12 AM, Frank Ward <fw...@nmsu.edu>

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Help with Endogenous Relational Operations Error

Thank you Frank. Sent with Unibox On Apr 19, 2016, at 11:12 AM, Frank Ward <fw...@nmsu.edu>

4/20/16

Federico Perea, Michael Bussieck2

4/18/16

Fede, GAMS has strict requirements about the data format it processes. The only variant is using $

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Fede, GAMS has strict requirements about the data format it processes. The only variant is using $

4/18/16

jaster...@gmail.com, Michael Bussieck2

4/18/16

Variable bound assignment in a loop

James, The listing (lst) file echos the expanded program at the top of the file. This usually helps

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Variable bound assignment in a loop

James, The listing (lst) file echos the expanded program at the top of the file. This usually helps

4/18/16

srikkanth madhavan, … Masoud Barati5

4/18/16

Constraint shadow prices for MIP models

In general the shadow price of the MIP problem is invalid. First, you should find the equivalent LP

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Constraint shadow prices for MIP models

In general the shadow price of the MIP problem is invalid. First, you should find the equivalent LP

4/18/16

1880191...@gmail.com

4/18/16

how to express the linear formulation for UC start-up cost in GAMS,thank you

Friend, Hello, I have difficulty in express the linear formulation(12) in GAMS,thank for your help,

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how to express the linear formulation for UC start-up cost in GAMS,thank you

Friend, Hello, I have difficulty in express the linear formulation(12) in GAMS,thank for your help,

4/18/16

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