'ApplicationError: No executable found for solver 'ipopt' in Pyomo

I am learning Pyomo and trying to use ipopt to solve an example question. but initially, I have installed package, then it always shows that there is not a ipopt found. After that, I reinstalled many time, now it shows that

'''WARNING: Could not locate the 'ipopt' executable, which is required for solver
    ipopt
---------------------------------------------------------------------------
ApplicationError                          Traceback (most recent call last)
<ipython-input-2-2e55f87657f9> in <module>
      1 model.N=50
      2 instance = model.create_instance()
----> 3 results = opt.solve(instance) # solves and updates instance

D:\Anacondo\lib\site-packages\pyomo\opt\base\solvers.py in solve(self, *args, **kwds)
    514         """ Solve the problem """
    515 
--> 516         self.available(exception_flag=True)
    517         #
    518         # If the inputs are models, then validate that they have been

D:\Anacondo\lib\site-packages\pyomo\opt\solver\shellcmd.py in available(self, exception_flag)
    116             if exception_flag:
    117                 msg = "No executable found for solver '%s'"
--> 118                 raise ApplicationError(msg % self.name)
    119             return False
    120         return True

ApplicationError: No executable found for solver 'ipopt'
'''**bold**

italic

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I have no idea how to fix it and I installed anaconda in desk D instead of C. Could anyone please help me, I need it for an assignment and exam in a month. Thanks.

Solution 1:^[1]

I got the same problem after installing 3.13.1. What I did is just to download 3.11.1, then save ipopt.exe in C:\ProgramData\Anaconda3\Library\bin

Then it works.

Solution 2:^[2]

For mac users:

Install homebrew in the terminal by:
rm -fr $(brew --repo homebrew/core)
brew tap homebrew/core
Install ipopt by:
brew install ipopt
Restart your IDE.

Solution 3:^[3]

Please, check this discussion https://github.com/conda-forge/ipopt-feedstock/issues/55 . I reported the same issue. Perhaps, you should downgrade IPOPT version to the supported one (v3.11.1).

Solution 4:^[4]

install this version: conda install -c conda-forge/label/cf202003 ipopt

from this link: https://anaconda.org/conda-forge/ipopt

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	xu meng
Solution 2	haydnD
Solution 3
Solution 4	amiro rezatti

'ApplicationError: No executable found for solver 'ipopt' in Pyomo

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Sources

Related Questions

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Solution 4:^[4]