Installing CBC Solver

[Taner Cokyasar]

Hi,

I have used Gurobi via Python for a long time, yet, now, I have to use a free solver for non-commercial usage issues. I checked many available options and saw CyLP. As I am familiar with Python, I thought using this solver and modeling environment could be easy. Yet, I failed in the first step and could not install CBC which is the required solver for CyLP. Since I failed, I ended up finding this forum and now asking your help to install CBC. Basically, I do not know where I will type the commands given in Step 1 of CyLP web page. Meanwhile, I read the Pyomo Documentation by considering to use Pyomo instead of CyLP. Yet, it also requires me to install a solver. Since I may have questions during the modeling process, I would prefer using Pyomo instead of CyLP.

Considering all this poorly written story, can you please suggest me what kind of solver and modeling tool I should use and how I can obtain them? I use a Win 10 PC with Python 2.7, Anaconda, and Jupyter Notebook installed.

Thanks,

Taner

[Siirola, John D]

Since you are already using anaconda, the easiest way to get Pyomo and CBC is:

conda install -c conda-forge pyomo coincbc

John

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[Taner Cokyasar]

Thanks for response, John, but it did not work. Here is the logs:

C:\Users\Taner>conda install -c conda-forge pyomo coincbc

Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

  - coincbc

Current channels:

  - https://conda.anaconda.org/conda-forge/win-64

  - https://conda.anaconda.org/conda-forge/noarch

  - https://repo.anaconda.com/pkgs/main/win-64

  - https://repo.anaconda.com/pkgs/main/noarch

  - https://repo.anaconda.com/pkgs/free/win-64

  - https://repo.anaconda.com/pkgs/free/noarch

  - https://repo.anaconda.com/pkgs/r/win-64

  - https://repo.anaconda.com/pkgs/r/noarch

  - https://repo.anaconda.com/pkgs/pro/win-64

  - https://repo.anaconda.com/pkgs/pro/noarch

  - https://repo.anaconda.com/pkgs/msys2/win-64

  - https://repo.anaconda.com/pkgs/msys2/noarch

To search for alternate channels that may provide the conda package you're

looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

[Santiago rodriguez]

If you just need an open source MILP/LP solver try glpk. I believe the channel you are trying to use for cbc only supports linux and osx but this one for glpk seems to have binaries for windows.

conda install -c conda-forge glpk 

[Taner Cokyasar]

Yep, it works. I have already installed glpk. I found this example. What do we write additionally to the provided code to solve the problem and get the results? Can you give me a quick intro?

Thanks,

[Bynum, Michael Lee]

There is extensive documentation online to help you get started with Pyomo. See pyomo.org.

Michael