##Requirements
- Installation of Flopy release 3.2.5 and
- Manual replacement of "mfmnw2.py" file (stored under: "YOURPYTHONPATH\Lib\site-packages\flopy\modflow") with the following one: https://github.com/modflowpy/flopy/blob/383438122fdb97623e9666fb11c8d9b84c9563d2/flopy/modflow/mfmnw2.py).
If the second step is not performed Flopy will not be able to write the "wellfield.mnw2" file and the modelling will not be possible !!!