Ipopt not running on windows.

[petrasvestartas]

We have been using lpopt for compas_cra package:
conda create -n cra python=3.10 pyomo=6.4.2 ipopt=3.14.9 compas

This works for mac and linux, but not for windows, so we also need to install very first version ipopt=3.11.1
It was working for multiple years for research, but now completely broke.

Is there any way that you could provide executable for 3.14.9 version too?

[mrmundt]

Hello @petrasvestartas . Pyomo does not distribute executables for solvers, so we will not be implementing this. However, some suggestions:

1. Submit your request to https://github.com/coin-or/Ipopt to see if they will consider distributing binaries
2. Consider installing IDAES and using their get-extensions capability: https://idaes-pse.readthedocs.io/en/latest/tutorials/getting_started/windows.html#install-idaes-extensions

[petrasvestartas]

You do, in the initial release.

[mrmundt]

This information is new to the current development team, as none of us were aware of any past releases of executables. Given the time that has passed, it is understandable that some knowledge may have been lost. However, please note that this practice has not been in place for many years and will not be implemented.

[jsiirola]

Please note that when you install Ipopt using conda, you are getting the Ipopt build from conda-forge. Those packages (https://anaconda.org/conda-forge/ipopt/) are maintained by a separate project and is not affiliated with the Pyomo project (and has no developers in common).

They do maintain current builds of Ipopt (with MUMPS) on all platforms except for win-32 (3.11.1 was their last win-32 build). Is it possible that you are using the 32-bit version of Conda and not the 64-bit version?

[petrasvestartas]

It is 64 bit.
We were running windows version using ipopt=3.11.1, which does not work anymore but now it works using 3.14.9. I know that there are different developers. But from our side we really need an executable that you do not ship. It would be really great that you could help.

Total process I use now:

• conda create -n cra python=3.10 pyomo=6.4.2 ipopt=3.14.9 compas
• conda activate cra
• pip install compas_assembly compas_cra
• Manually download https://github.com/coin-or/Ipopt/releases/download/releases%2F3.14.9/Ipopt-3.14.9-win64-msvs2019-md.zip
• Place sub-folder bin contents to path_to_environment/Library/bin folder. For example: C:Users\petras\anaconda3\envs\cra_dev\Library\bin