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Sep 28

Editing RHS value within multiple solves in pyomo

0 I am trying to switch Gams to pyomo so I'm unexperienced in pyomo. I have a basic model to

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Editing RHS value within multiple solves in pyomo

0 I am trying to switch Gams to pyomo so I'm unexperienced in pyomo. I have a basic model to

Sep 28

Sep 16

Pyomo wheel for aarch64 architecture

Is there a pyomo wheel for aarch64 ? Could you give me the link if found! Thanks And is there any

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Pyomo wheel for aarch64 architecture

Is there a pyomo wheel for aarch64 ? Could you give me the link if found! Thanks And is there any

Sep 16

Marek Makowski2

Sep 15

porting a pyomo concrete model to another computer

I just want to share the experience with using dill for porting models specified with the python

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porting a pyomo concrete model to another computer

I just want to share the experience with using dill for porting models specified with the python

Sep 15

Sep 12

Cplex reports my model is not convex

Hi, How can I fix the cplex error that the model is not convex? The error results from the following

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Cplex reports my model is not convex

Hi, How can I fix the cplex error that the model is not convex? The error results from the following

Sep 12

Sep 12

pyomo.dae.simulator.Simulator should use initial guess for algebraic variables

Hello everyone, Currently, the Simulator reads only the initial guesses for the differential

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pyomo.dae.simulator.Simulator should use initial guess for algebraic variables

Hello everyone, Currently, the Simulator reads only the initial guesses for the differential

Sep 12

Marek Makowski, Siirola, John3

Sep 8

deactivating objective without knowing its name

Many thanks, John. I wonder where I could find this (and similar) tip in the Pyomo doc? Cheers, Marek

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deactivating objective without knowing its name

Many thanks, John. I wonder where I could find this (and similar) tip in the Pyomo doc? Cheers, Marek

Sep 8

Sep 4

Problem with the initial value in optimization problem

I have formulated the following problem that tries to minimize the cost of imported energy by

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Problem with the initial value in optimization problem

I have formulated the following problem that tries to minimize the cost of imported energy by

Sep 4

r.ilma...@gmail.com

Aug 24

Error in formulating piecewise linear constraints with two subsets

Dear All, I am currently dealing with facility location - allocation problem for and thus,

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Error in formulating piecewise linear constraints with two subsets

Dear All, I am currently dealing with facility location - allocation problem for and thus,

Aug 24

Lucas Pierezan Magalhães

Aug 24

Appsi HiGHS not working with multiple threads

Hello, I'm using pyomo+highs inside a web server that creates threads to handle requests. I'm

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Appsi HiGHS not working with multiple threads

Hello, I'm using pyomo+highs inside a web server that creates threads to handle requests. I'm

Aug 24

Aug 21

Accessing GCG from Pyomo package

Dear support team, I tried to use SCIP and also GCG on Pyomo in Colab to solve mixed integer

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Accessing GCG from Pyomo package

Dear support team, I tried to use SCIP and also GCG on Pyomo in Colab to solve mixed integer

Aug 21

Jonathan Nowacki, … Alessandro Zocca3

Aug 18

Pyomo Textbook? Teachers Aid? Example problems & answers?

Hi Jon, You could consider using this Jupyter book https://mobook.github.io/MO-book/intro.html which

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Pyomo Textbook? Teachers Aid? Example problems & answers?

Hi Jon, You could consider using this Jupyter book https://mobook.github.io/MO-book/intro.html which

Aug 18

Martiene Ubbens, Jonathan Nowacki2

Aug 18

Beginner problem (Pyomo - Nevergrad)

What textbook are you using? On Saturday, February 4, 2023 at 12:22:09 AM UTC-5 Martiene Ubbens wrote

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Beginner problem (Pyomo - Nevergrad)

What textbook are you using? On Saturday, February 4, 2023 at 12:22:09 AM UTC-5 Martiene Ubbens wrote

Aug 18

ROHIT KRISHNAN2

Aug 18

Regarding Persistent Solver

Hi , I have code written to repeatedly solve the model by making small changes to the model based on

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Regarding Persistent Solver

Hi , I have code written to repeatedly solve the model by making small changes to the model based on

Aug 18

Jul 20

Pyomo objective function and constraint declaration

GITHUB LINK IN CASE IT IS EASIER https://github.com/juanraposo2000/PYOMO_MMP El jueves, 20 de julio

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Pyomo objective function and constraint declaration

GITHUB LINK IN CASE IT IS EASIER https://github.com/juanraposo2000/PYOMO_MMP El jueves, 20 de julio

Jul 20

Jul 19

Solver time limit for cbc is ignored when running and solving a model on Google cloud.

I am running a large Pyomo model and using the following options: opt = pe.SolverFactory('cbc

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Solver time limit for cbc is ignored when running and solving a model on Google cloud.

I am running a large Pyomo model and using the following options: opt = pe.SolverFactory('cbc

Jul 19

Victor Duraes De Faria

Jul 19

How to set expand_all_set_operators=False

I got the following warning in Pyomo: Reading data files.WARNING: Extracting subsets for Set tech_all

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How to set expand_all_set_operators=False

I got the following warning in Pyomo: Reading data files.WARNING: Extracting subsets for Set tech_all

Jul 19

Jul 17

Nonlinear problems

I am trying to solve a problem of the form min ( norm (GB*X+GB*x^2-P,2) ^2 ) st norm(GD*X,2)^2<=0

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Nonlinear problems

I am trying to solve a problem of the form min ( norm (GB*X+GB*x^2-P,2) ^2 ) st norm(GD*X,2)^2<=0

Jul 17

Victor Duraes De Faria2

Jul 14

How to use solver options with multiple word elements (eg. barrier.colnonzeros)

I found you can use "_" in place of "." to access these parameters. For example

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How to use solver options with multiple word elements (eg. barrier.colnonzeros)

I found you can use "_" in place of "." to access these parameters. For example

Jul 14

Maximilian Hoffmann

Jul 6

Extreme Rays from Gurobi

Hello everyone, I'm curious whether there's an option to retrieve extreme rays from Gurobi

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Extreme Rays from Gurobi

Hello everyone, I'm curious whether there's an option to retrieve extreme rays from Gurobi

Jul 6

arg...@gmail.com, Siirola, John D3

Jun 28

instance of equality constraint

Hi John, thanks for the answer Here it is the original constraint where the parameter is in the RHS

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instance of equality constraint

Hi John, thanks for the answer Here it is the original constraint where the parameter is in the RHS

Jun 28

juan raposo, David Woodruff2

Jun 27

getting the dual variables

The statement on the stack overflow page you cited (that you can't get duals for a problem with

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getting the dual variables

The statement on the stack overflow page you cited (that you can't get duals for a problem with

Jun 27

Jun 22

Easy issue about the piecewise characterize_function()

I cannot find how the pyomo.environ and pyomo.core are related, in particular if it is safe and

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Easy issue about the piecewise characterize_function()

I cannot find how the pyomo.environ and pyomo.core are related, in particular if it is safe and

Jun 22

Jun 21

Dual variables issue

Hi, I'm currently developing some code requiring access to some dual variables regarding several

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Dual variables issue

Hi, I'm currently developing some code requiring access to some dual variables regarding several

Jun 21

Hayford Adjavor, … David Woodruff5

Jun 17

DataPortal() Issue.

For one thing, the excel file test.xlsx does not seem to contain any named ranges. Based on the error

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DataPortal() Issue.

For one thing, the excel file test.xlsx does not seem to contain any named ranges. Based on the error

Jun 17

Ashlesha Tiple, … Esteban Daniel Gonzalez Iakl4

Jun 16

Extracting Number of iterations for IPOPT

Hi, have you found a solution for this issue, easier than parsing the log file? Im looking into this

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Extracting Number of iterations for IPOPT

Hi, have you found a solution for this issue, easier than parsing the log file? Im looking into this

Jun 16

Marek Makowski, Remo Andreoli6

Jun 16

Merging two models that shall share several variables

I would have suggested the same thing - actually, a slightly worse solution using the m.

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Merging two models that shall share several variables

I would have suggested the same thing - actually, a slightly worse solution using the m.

Jun 16

Jun 14

Inquiry regarding Changing Solver Options in Colab

Hi all, I tried to change the option, such as feas_tolerance, of couenne solver (global solver of

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Inquiry regarding Changing Solver Options in Colab

Hi all, I tried to change the option, such as feas_tolerance, of couenne solver (global solver of

Jun 14

Jeffrey Kantor, Michael Bynum2

Jun 13

Trouble with HiGHS

Currently, to get this to work with appsi-based solver interfaces, you have to do the following:

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Trouble with HiGHS

Currently, to get this to work with appsi-based solver interfaces, you have to do the following:

Jun 13

Marek Makowski2

Jun 12

RangeSet in abstract model parametrized by concrete model parameter?

The following, based on the approach suggested by John Sirola, solves the above issue, although

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RangeSet in abstract model parametrized by concrete model parameter?

The following, based on the approach suggested by John Sirola, solves the above issue, although

Jun 12

Chaymae Makri, … Ja Eddouibi10

Jun 10

MINLP problem: solver error

Thanks for your response, but I have I request that when I install CPLEX on my computer, I can use

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MINLP problem: solver error

Thanks for your response, but I have I request that when I install CPLEX on my computer, I can use

Jun 10

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