No executable found for solver 'cplex'

[Ihsancan özpoyraz]

Hi all,

Could anyone help me about this problem: " No executable found for solver 'cplex' " ?

I've just started to learn how to use PySP. I had this issue while trying to run the farmer example which is available on pyomo examples.

Here is the command that I used:

runef --model-directory=models --instance-directory=scenariodata --solve --solver=cplex

Then I got this message:

WARNING: "[base]/site-packages/pyomo/pysp/util/config.py", 1867, __call__

DEPRECATED: The '--model-directory' command-line option has been deprecated and will be removed in the future. Please use --model-location instead.

WARNING: "[base]/site-packages/pyomo/pysp/util/config.py", 1867, __call__

DEPRECATED: The '--model-directory' command-line option has been deprecated and will be removed in the future. Please use --model-location instead.

Importing module=/Users/ihsancanozpoyraz/Documents/PM/pyomo_examples_d58d554/pysp/farmer/models/ReferenceModel.py

Module successfully loaded

Initializing extensive form algorithm for stochastic programming problems.

WARNING: "[base]/site-packages/pyomo/solvers/plugins/solvers/CPLEX.py", 225, _default_executable

Could not locate the 'cplex' executable, which is required for solver cplex

Exception encountered. Scenario tree manager attempting to shut down.

runef: APPLICATION ERROR:

No executable found for solver 'cplex'

To obtain further information regarding the source of the exception, use the --traceback option

According to my google search, it seems that it is a PATH problem. But, unfortunately, I do not know how to solve it.

I am at the infancy of using the terminal and so on. Please help me with this!

Note-1: CPLEX is already installed (12.6.3.0). However, just typing 'cplex' to terminal does not give a proper response (-bash: cplex: command not found). I need to navigate /Users/yourusername/Applications/IBM/ILOG/CPLEX_Studio1263/cplex/bin/x86-64_osx. There is the cplex.exec file that I can use for running cplex. And it is running without any problem.

Note-2: I was able to get the solution by just changing the solver from cplex to glpk. But, I need to use cplex.

Note-3: Using Mac - OSX Yosemite

Thanks in advance,

Ihsan

[Gabriel Hackebeil]

I modify the PATH settings on my Mac by adding a line such as what is below to a file named .bash_profile in my home directory (/Users/<myusername>/.bash_profile):

                                                                                                                      

export PATH=~/Software/bin:$PATH

You need to find the directory where the cplex executable is (probably something ending with /cplex/bin/x86-64_osx/), and replace “~/Software/bin” in my example with the full path to the correct directory on your machine.

Gabe

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[Ihsancan özpoyraz]

Wow, you were so quick. That really worked, thanks a lot Gabe!

Ihsan

[Yeming Shen]

Hi, All,

I am new to python and pyomo too and I encounter the same problem. I am also using mac. I wonder where is the file "bash_profile" since I could not find it under "/Users/<myusername>"? Thank you very much for you time.

Best,

Michael

在 2016年10月25日星期二 UTC-4下午4:50:03，Gabriel Hackebeil写道：

[Michael Bynum]

The file is actually called “.bash_profile”. The “.” at the beginning is important. It means it is a hidden file. If you have never modified the file, I’m not sure it will exist. You can create it though. To see if it does exist, in a terminal type “ls -a”. 

Michael

On Feb 26, 2018, at 7:40 AM, Yeming Shen <michael...@gmail.com> wrote:

Hi, Ihsan,

[Yeming Shen]

Thank you all. Although I think the syntax should be 

export PATH="/Applications/CPLEX_Studio128/cplex/bin/x86-64_osx:$PATH"

在 2018年2月26日星期一 UTC-5上午9:48:05，Michael Bynum写道：

[dinesh singamsetti]

i have ubuntu and have the same problem. how can i add the path now?

Gabe

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[David Woodruff]

On Ubuntu, the file you need to modify is called .bashrc  (not ./bash_profile, which is the correct file for a Mac)

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[dinesh singamsetti]

i did that but still couldn't resolve

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