I have a project using CPlex 12.6.1 and I don't know how to upgrade it to a 20.X.X.

Could someone share a list of tasks with some baby steps to do it ?

Any help ?

Here are the steps for using Cplex 20.X.X in a .NET project.

1. Install Cplex 20.1.
2. Create a new .NET Framework project.
3. Change the platform to x64.
4. Add reference to ILOG.CPLEX.dll and ILOG.Concert.dll to your .net project. Assuming Cplex is installed at "C:\Program Files\IBM\ILOG\CPLEX_Studio201", the two dlls should be available at "C:\Program Files\IBM\ILOG\CPLEX_Studio201\cplex\bin\x64_win64".
   
   

I hope this answers your question.

Thank you @Ruchir Santuka

Hi,

Steps to Upgrade CPLEX in .NET:

Steps to Upgrade CPLEX in .NET:

1.Download & Install
Install CPLEX Optimization Studio 20.x.x from IBM's website.

2.Remove Old DLLs
In Visual Studio, remove references to:

ILOG.CPLEX.dll

ILOG.Concert.dll from version 12.6.1.

3. Add New References
Add the 20.x.x DLLs from:

makefile
Copy
Edit
C:\Program Files\IBM\ILOG\CPLEX_Studio201\cplex\bin\x64_win64\
C:\Program Files\IBM\ILOG\CPLEX_Studio201\concert\bin\x64_win64\

4. Update Code (If Needed)

Adjust for API or method changes.

Ensure proper object disposal (e.g., cplex.Dispose()).

5. Set Environment Variables
Add the new DLL paths to the PATH system environment variable.

6. Rebuild and Test
Rebuild your project and validate model behavior.

Thanks, Regards

Kamal Hinduja Geneva , Switzerland