Win installation error

WIN11
anaconda python 3.7

```
Building wheel for pyrfr (setup.py) ... error
error: subprocess-exited-with-error

× python setup.py bdist_wheel did not run successfully.
│ exit code: 1
╰─> [8 lines of output]
[, ]
running bdist_wheel
running build
running build_ext
building 'pyrfr._regression' extension
swigging pyrfr/regression.i to pyrfr/regression_wrap.cpp
swig.exe -python -c++ -modern -py3 -features nondynamic -I./include -o pyrfr/regression_wrap.cpp pyrfr/regression.i
error: command 'swig.exe' failed: None
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for pyrfr
Running setup.py clean for pyrfr
Successfully built lap smac pynisher
Failed to build pyrfr
Installing collected packages: sortedcontainers, pytz, msgpack, lap, heapdict, geojson, easydict, zipp, zict, xmltodict, Werkzeug, typing-extensions, tornado, toolz, tifffile, threadpoolctl, tblib, shapely, scipy, regex, pyzmq, pyyaml, PyWavelets, python-dateutil, pyrfr, pyparsing, pycryptodome, psutil, opencv-contrib-python, networkx, natsort, munch, MarkupSafe, locket, llvmlite, joblib, itsdangerous, imageio, future, fsspec, fonttools, et-xmlfile, emcee, cython, cycler, colorama, cloudpickle, chardet, Babel, tqdm, scikit-learn, pynisher, partd, pandas, packaging, openpyxl, numba, kiwisolver, Jinja2, importlib-metadata, ConfigSpace, bce-python-sdk, scikit-image, motmetrics, matplotlib, dask, click, pycocotools, flask, distributed, smac, Flask-Babel, visualdl, paddleslim
Running setup.py install for pyrfr ... error
error: subprocess-exited-with-error

× Running setup.py install for pyrfr did not run successfully.
│ exit code: 1
╰─> [9 lines of output]
[, ]
running install
D:\anaconda3\envs\PaddleRS\lib\site-packages\setuptools\command\install.py:37: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
setuptools.SetuptoolsDeprecationWarning,
running build_ext
building 'pyrfr._regression' extension
swigging pyrfr/regression.i to pyrfr/regression_wrap.cpp
swig.exe -python -c++ -modern -py3 -features nondynamic -I./include -o pyrfr/regression_wrap.cpp pyrfr/regression.i
error: command 'swig.exe' failed: None
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: legacy-install-failure

× Encountered error while trying to install package.
╰─> pyrfr

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.
```

Start by reproducing the installation on Windows 11 with Anaconda Python 3.7 and inspect the pyrfr build output. Review pyrfr/regression.i and the swig.exe invocation shown in the log; done means identifying the installation failure and verifying that pyrfr installs successfully in the reported environment.

Written by the indexing model from the issue text.