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I have recently tried to use the CPLEX solver to solve one of my Pyomo models. I first installed the community version that is available:https://pypi.org/project/cplex/ using pip.

However, I am trying to switch to the academic license of the solver and I am facing several problems. The main issue is that when I call SolverFactory('cplex') I get the following error:

pyomo.common.errors.ApplicationError: No executable found for solver 'cplex'

If I use "cplex_direct" the solver works as expected but the community edition is used instead. I also tried running the setup.py script available at /Applications/CPLEX_Studio221/cplex/python/3.9/x86-64_osx but I could not fix the problem. How do I resolve this?

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2 Answers 2

Reset to default
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One of the following will probably solve the problem:

  1. Add Cplex to the system Path in your laptop

  2. add executable= to the Solver factory:

    solver = SolverFactory(cplex, executable='C:/Program Files/...')

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  • $\begingroup$ Doesn't your answer refers to Windows specifically? I tried a similar approach on MacOS but it did not work. Can you elaborate more if you are familiar with how I can do that? $\endgroup$
    – Pia MiA
    Nov 16, 2022 at 17:33
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To run CPLEX on MacOS use the code:

    solver = SolverFactory('cplex', executable = '/Applications/CPLEX_Studio2211/cplex/bin/x86-64_osx/cplex')
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