Decision Optimization

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  • 1.  CPLEX/DOCPLEX Run Time Problem on Apple Silicon

    Posted Fri September 30, 2022 09:20 AM

    I installed CPLEX Studio 22.1 on my Apple Macbook (M2 CPU). Almost everything seems to be fine:

    • I can call cplex and cpoptimizer interactives from /Applications/CPLEX_Studio221/cplex/bin/x86-64_osx/cplex and /Applications/CPLEX_Studio221/cpoptimizer/bin/x86-64_osx/cpoptimizer, and can also optimize some examples of mp/cp successfully.
    • I installed python packages: cplex and docplex via the commmand
    python /Applications/CPLEX_Studio221/python/setup.py install

    and it seems to be fine also.

    • I tested the system with the command python -m docplex.cp.check_list and got the following:
    Execution environment:
 * System: Darwin, 64bit
 * Python version: 3.10.6, 64 bits (/Users/username/.pyenv/versions/3.10.6/Library/Frameworks/Python.framework/Versions/3.10/bin/python)
 * Docplex version: 2.23.221
 * Optional packages: numpy: 1.23.2, panda: None, matplotlib: 3.5.3
 * Solver agent: local, executable file: '/Applications/CPLEX_Studio221/cpoptimizer/bin/x86-64_osx/cpoptimizer'
 * Solver version: 22.1.0.0
No problem found.
    • HOWEVER, when I tried with python -m docplex.mp.check_list, I got
    * system is: Darwin 64bit
* Python version 3.10.6, located at: /Users/username/.pyenv/versions/3.10.6/Library/Frameworks/Python.framework/Versions/3.10/bin/python
* docplex is present, version is 2.23.221
* CPLEX library is not available
* pandas is present, version is 1.4.3
Cplex runtime not found, error importing cplex: dlopen(/Users/username/.pyenv/versions/3.10.6/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cplex-22.1.0.0-py3.10.egg/cplex/_internal/py310_cplex2210.so, 0x0002): tried: '/Users/username/.pyenv/versions/3.10.6/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/cplex-22.1.0.0-py3.10.egg/cplex/_internal/py310_cplex2210.so' (mach-o file, but is an incompatible architecture (have (x86_64), need (arm64e)))

* diagnostics: 1
  -- No local installation of CPLEX has been found.

    As far as I know, the docplex.cp.model works here, but docplex.mp.model failed since the local cplex not found on the system. The variable PYTHONPATH has been set to /Applications/CPLEX_Studio221/cplex/bin/x86-64_osx/. I have no ideas what I missed to configure on the installation process.

    Moreover, I still get a minor problem when trying to run oplide. It can not be executed, but oplrun works fine.



    ------------------------------
    Ratthaprom Promkam
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    #DecisionOptimization


  • 2.  RE: CPLEX/DOCPLEX Run Time Problem on Apple Silicon

    Posted Fri September 30, 2022 10:20 AM
    If you are with a Mx Apple cpu, I bet the python you run is running in arm64 mode which will fail at loading the intel based CPLEX libraries.
    You should try to run it with '''arch -x86_64 python'''

    ------------------------------
    Vincent Beraudier
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    Original Message


  • 3.  RE: CPLEX/DOCPLEX Run Time Problem on Apple Silicon

    Posted Fri September 30, 2022 12:14 PM
    Thanks for the suggestion.
    Unfortunately, the command python -m docplex.mp.check_list, still provides me the same result,
    i.e., CPLEX library is not available.

    I really wonder since the same process of installation and configuration works with cpoptimizer.


    ------------------------------
    Ratthaprom Promkam
    ------------------------------

    Original Message


  • 4.  RE: CPLEX/DOCPLEX Run Time Problem on Apple Silicon

    Posted Sat September 09, 2023 10:24 AM

    Any solutions to this? I have the same problem. 



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    Zhiwei Feng
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    Original Message