Pyomo Forum

Hello Armaghan, I hope you are doing well. Suppose X, Y, and Z are your variables; each of which

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

Hi there! I'm trying to model a heat exchanger with n segments in pyomo but I get weird results.

Dear experts I am satisfied with use of Pyomo. BTW, when we would like to increase variables as

Thank you @venu and @heidari. Conversion of my model nonlinear to linear is little complicated. I

Dear Dr. D. Woodruff I read the first paper about mpi-sppy, and then I understand you are the member

Hi All Thank you all for your help I've downloaded latest pyomo (6.9.2.dev0) from github and

Dear pyomo community, we developed a large energy system model using pyomo and the pyomo.gdp

Bochen, Great news. I am happy you could solve the issue with tuning the solver's parameters. On

Can I create a GUI based on Pyomo, add some algorithms, and build in some open-source solvers (such

thanks! The problem can be solved, but when the gap is close to 17%, the bound and gap change at a

Hi Mikkel, I have raised a PR that will solve this issue. Let me know if you have any questions: add

Hello Tim, I hope you are doing well. What do you mean by matrix? If you are going to import some

Hello Erico, I hope you are doing well. If I got your message correct, you will define your new

Hello Jaime, I hope you are doing well. Unfortunately, the bi-level extension of Pyomo is now

Hello, For the Bi-Level Mixed-Integer Programming (Bi_MIP) problem, and its implementation in Pyomo,

Hello Giuseppes, I hope you are doing well. For Benders Decomposition and its implemented version in

Hello Alessandra, I hope you are doing well. Based on your function, you have three terms: model.

Hello Mohammad, I hope you are doing well. Is the GAMS a typo? Why do you want GAMS to save the log

Hello, Your method seems rational! Could you please share the error and part of the code,

Hello Audrey, I hope you are doing well. Regarding the nature of your problem, you could decrease the

Hello To To, I hope you are doing well. Where do you want to install IPOPT? --- If you are going to

Hello Andreas, I hope you are doing well. Based on the new version of ChatGPT 4.5, you can do the

Hello Vincenzo, I hope you are doing well. Could you provide your code or a part of it so it would be

Hello Luis, I hope you are doing well. You have two options: 1- You can define the lines based on the

Hello Amin, I hope you are doing well. Unfortunately, when the solver does not achieve a feasible

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

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

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

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

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

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

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