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Dec 5

Windows, use HiGHS without installing MS C++ Build Tools

I would like to use Pyomo with HiGHS. My understanding is that for this I need APPSI and, in

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Windows, use HiGHS without installing MS C++ Build Tools

I would like to use Pyomo with HiGHS. My understanding is that for this I need APPSI and, in

Dec 5

Nov 30

How to install IPOPT-3.14.16

Hello, I want to install IPOPT-3.14.16 from https://github.com/coin-or/Ipopt/releases and use it in

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How to install IPOPT-3.14.16

Hello, I want to install IPOPT-3.14.16 from https://github.com/coin-or/Ipopt/releases and use it in

Nov 30

Nov 15

PYOMO ODE Solve with Manual Discretization

Hi, can anyone help me figure out where I made a mistake in the following code ? I am trying to solve

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PYOMO ODE Solve with Manual Discretization

Hi, can anyone help me figure out where I made a mistake in the following code ? I am trying to solve

Nov 15

Muhammad Hamza ali

Nov 15

Configuring ma57 (HSL) with pyomo and Ipopt (Windows)

"I recently obtained the academic version of solvers from the HSL website and need to configure

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Configuring ma57 (HSL) with pyomo and Ipopt (Windows)

"I recently obtained the academic version of solvers from the HSL website and need to configure

Nov 15

r.ilma...@gmail.com

Nov 9

creating constraint with in between two same variables

Dear all, I'd like to build a constraint as such: model.y[i] * 0.98 <= demand <= model.y[i]

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creating constraint with in between two same variables

Dear all, I'd like to build a constraint as such: model.y[i] * 0.98 <= demand <= model.y[i]

Nov 9

mikkel.a...@gmail.com

Oct 22

appsi_highs fails with quadratic objective

Hi. I'm trying to run my large scale energy system model (1.5 mill rows x 1 mill cols) with a

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appsi_highs fails with quadratic objective

Hi. I'm trying to run my large scale energy system model (1.5 mill rows x 1 mill cols) with a

Oct 22

Oct 17

CoIn-OR optimization suite + Python docker image available

Hello! https://github.com/skannan-maf/optimization-suite-docker I made a dockerfile based on Python:

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CoIn-OR optimization suite + Python docker image available

Hello! https://github.com/skannan-maf/optimization-suite-docker I made a dockerfile based on Python:

Oct 17

Oct 17

Solving PDE in Pyomo

Hey, I am trying to set up a chromatography model in Pyomo. I am first trying to do that by just

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Solving PDE in Pyomo

Hey, I am trying to set up a chromatography model in Pyomo. I am first trying to do that by just

Oct 17

François LESAGE

Oct 17

DAE integration with events (rootfinding) within Pyomo

Hello Everybody, I have developed a model including a DAE system (about 20 equations) and relying

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DAE integration with events (rootfinding) within Pyomo

Hello Everybody, I have developed a model including a DAE system (about 20 equations) and relying

Oct 17

MohammadSaeed Omidi

Sep 26

cant save logfile in pyomo

im using gams 24.1 to solve mip model after solving when i want to save log file i got error here is

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cant save logfile in pyomo

im using gams 24.1 to solve mip model after solving when i want to save log file i got error here is

Sep 26

arg...@gmail.com, Siirola, John4

Sep 18

random order of the lp file

John, Dheepak Krishnamurthy from EPRI proposes to convert all the pyomo sets we have define as

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random order of the lp file

John, Dheepak Krishnamurthy from EPRI proposes to convert all the pyomo sets we have define as

Sep 18

Sep 12

How to contribute new solver

Hi, I have a new solver that has a C interface, I would like to contribute an interface between it

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How to contribute new solver

Hi, I have a new solver that has a C interface, I would like to contribute an interface between it

Sep 12

Alessandra Vidal Meza

Sep 12

Ideas to linearize objective function

Hi all, We're working on an optimization problem for an energy project using CPLEX. Our objective

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Ideas to linearize objective function

Hi all, We're working on an optimization problem for an energy project using CPLEX. Our objective

Sep 12

Sep 12

Variable name changed in MPS file

Hello all, i am writing a MPS file out of pyomo to solve it directly in Gurobi. If i am writing the

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Variable name changed in MPS file

Hello all, i am writing a MPS file out of pyomo to solve it directly in Gurobi. If i am writing the

Sep 12

Aug 22

Usage of user specific matrix A in LP as an input for GLPK solve

Hello all, I need to use GLPK for solving linear programming problems in my research. I already have

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Usage of user specific matrix A in LP as an input for GLPK solve

Hello all, I need to use GLPK for solving linear programming problems in my research. I already have

Aug 22

giuseppes...@gmail.com

Jul 19

Problem with the dual variables fixing the value of a variable

Hi, I am pretty new to Pyomo. I am sorry if the question is trivial, but I do not understand. I have

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Problem with the dual variables fixing the value of a variable

Hi, I am pretty new to Pyomo. I am sorry if the question is trivial, but I do not understand. I have

Jul 19

Jul 16

can pyomo do gurobi non-interactive?

I am using pyomo to build a model and using the gurobi solver. Some of my models take a while to

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can pyomo do gurobi non-interactive?

I am using pyomo to build a model and using the gurobi solver. Some of my models take a while to

Jul 16

roli....@gmail.com

Jul 14

Iteratively solving AbstractModel

I have a model where I seek a solution that represents a connected graph, so I am checking the cuts

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Iteratively solving AbstractModel

I have a model where I seek a solution that represents a connected graph, so I am checking the cuts

Jul 14

Cacharmday, … roli....@gmail.com4

Jul 13

modify model by adding constraints

I'm trying to iteratively solve my model and update a constraint list using the way described

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modify model by adding constraints

I'm trying to iteratively solve my model and update a constraint list using the way described

Jul 13

Aderinsola Aliu, Nicholson, Bethany L.3

Jul 13

How to install IPOPT Linear Solver using Google Colab Python Environment

Hello Bethany, Thank you so much for this information. I ran the block of code to install Ipopt and

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How to install IPOPT Linear Solver using Google Colab Python Environment

Hello Bethany, Thank you so much for this information. I ran the block of code to install Ipopt and

Jul 13

Jul 1

Feasible on GAMS, Infeasible on Pyomo.. why?

Hi everyone, I am trying to solve the optimization problem in the paper 'System-level analysis of

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Feasible on GAMS, Infeasible on Pyomo.. why?

Hi everyone, I am trying to solve the optimization problem in the paper 'System-level analysis of

Jul 1

May 29

Nonlinear Bilevel Problem

Hi everyone, I'm wonder if is possible to solve nonlinear bilevel problems using the pyomo.

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Nonlinear Bilevel Problem

Hi everyone, I'm wonder if is possible to solve nonlinear bilevel problems using the pyomo.

May 29

Garrett Dowdy, … Wei Wan10

May 28

Could not locate the 'cbc' executable, which is required for solver cbc

Thank you ! On Tue, May 28, 2024 at 10:39 AM 'Siirola, John' via Pyomo Forum <pyomo-forum@

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Could not locate the 'cbc' executable, which is required for solver cbc

Thank you ! On Tue, May 28, 2024 at 10:39 AM 'Siirola, John' via Pyomo Forum <pyomo-forum@

May 28

May 26

Pass the the results of feasRelax to Pyomo

I am using Pyomo 6.6.1 and Gurobipy version 10.0.2 to solve MIP problems. When I create the model

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Pass the the results of feasRelax to Pyomo

I am using Pyomo 6.6.1 and Gurobipy version 10.0.2 to solve MIP problems. When I create the model

May 26

May 12

Which version of pyomo can scip 6 be invoked by

the version of scip and pyomo package in linux is scip 6 pyomo 6.6.2 python 3.7 I found that pyomo

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Which version of pyomo can scip 6 be invoked by

the version of scip and pyomo package in linux is scip 6 pyomo 6.6.2 python 3.7 I found that pyomo

May 12

May 10

Param takes 3 positional arguments but 4 were given....

I'm building a model and I keep getting an error that my Param is failing because it takes 3

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Param takes 3 positional arguments but 4 were given....

I'm building a model and I keep getting an error that my Param is failing because it takes 3

May 10

May 10

Setting MIP and NLP solvers path using Pyomo MindtPySolver

I am using Pyomo 5.6.8 and trying to resolve a non linear optimization problem using MindtPySolver. I

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Setting MIP and NLP solvers path using Pyomo MindtPySolver

I am using Pyomo 5.6.8 and trying to resolve a non linear optimization problem using MindtPySolver. I

May 10

May 9

Is there any way to use Lazy constraints in Pyomo?

Dear support team, I would like to know if there exists any way to implement a Lazy constraint in the

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Is there any way to use Lazy constraints in Pyomo?

Dear support team, I would like to know if there exists any way to implement a Lazy constraint in the

May 9

Kirn Zafar, … A S4

May 5

Pyomo with GLPK solver

One easy way is using google colab https://github.com/OptimizationExpert/Pyomo/blob/main/

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Pyomo with GLPK solver

One easy way is using google colab https://github.com/OptimizationExpert/Pyomo/blob/main/

May 5

May 4

I am trying to run this constraint using pyomo and solver is IPOPT. Can somebody please help. I have

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I am trying to run this constraint using pyomo and solver is IPOPT. Can somebody please help. I have

May 4

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