"no arguments in initialization list" runtime error

Hi, I’m running into a cryptic error. My CRS in the geopandas dataframe seems to be properly set, however I cannot convert it to any other CRS.

>>> print(gdf_PLU.crs)
epsg:2193
>>>gdf_PLU.to_crs(epsg=4326)
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-92-46b32e6c8012> in <module>()
      1 print(gdf_PLU.crs)
----> 2 gdf_PLU.to_crs(epsg=4326)

~/anaconda3/envs/hthf/lib/python3.6/site-packages/geopandas/geodataframe.py in to_crs(self, crs, epsg, inplace)
    384         else:
    385             df = self.copy()
--> 386         geom = df.geometry.to_crs(crs=crs, epsg=epsg)
    387         df.geometry = geom
    388         df.crs = geom.crs

~/anaconda3/envs/hthf/lib/python3.6/site-packages/geopandas/geoseries.py in to_crs(self, crs, epsg)
    283             except TypeError:
    284                 raise TypeError('Must set either crs or epsg for output.')
--> 285         proj_in = pyproj.Proj(self.crs, preserve_units=True)
    286         proj_out = pyproj.Proj(crs, preserve_units=True)
    287         project = partial(pyproj.transform, proj_in, proj_out)

~/anaconda3/envs/hthf/lib/python3.6/site-packages/pyproj/__init__.py in __new__(self, projparams, preserve_units, **kwargs)
    356         # on case-insensitive filesystems).
    357         projstring = projstring.replace('EPSG','epsg')
--> 358         return _proj.Proj.__new__(self, projstring)
    359 
    360     def __call__(self, *args, **kw):

_proj.pyx in _proj.Proj.__cinit__ (_proj.c:1170)()

RuntimeError: b'no arguments in initialization list'

I can’t find this error message in any other issue. From similar issues it seems some data files could be missing (if so, how can I install them; I’m using the binary that is dragged in by conda-forge geopandas). Or is it something else?

[AlexandraKapp]

so I had the same problem. Using conda uninstall pyproj and then pip install pyproj worked to run the code

from pyproj import Proj Proj(‘+init=epsg:2193’, preserve_flags=True)

With pip version 2.2.1 is installed, so that workes, but conda uses Version 1.9.6.

But once I installed geopandas, conda would install pyproj with Version 1.9.6 again and then my code would also crashed again.

It worked, once I manually deleted the pyproj folder in anaconda\Lib\site-packages instead of using conda uninstall. And then use pip install pyproj.

[ycebear]

Thanks a lot for all the helpful comments ! The solution of @rickantonais worked for me too:

1. no additional download necessary, but introduce the following code:
2. import os
3. os.environ['PROJ_LIB']=r"C:[... _path to_ ….]\Anaconda3\Library\share"