ImportError: DLL load failed

[dpoursanidis]

Hi Nathan,

Following the guidelines i end to that error:

(bathymetry) D:\IC2data\C-SHELPh-main\C-SHELPh-main\4.Tutorial\code>python 1_test_env.py
Traceback (most recent call last):
File "D:\IC2data\C-SHELPh-main\C-SHELPh-main\4.Tutorial\code\1_test_env.py", line 24, in
raise e
File "D:\IC2data\C-SHELPh-main\C-SHELPh-main\4.Tutorial\code\1_test_env.py", line 17, in
import fiona
File "C:\Users\DimitrisPoursanidis\anaconda3\envs\bathymetry\lib\site-packages\fiona_init_.py", line 86, in
from fiona.collection import BytesCollection, Collection
File "C:\Users\DimitrisPoursanidis\anaconda3\envs\bathymetry\lib\site-packages\fiona\collection.py", line 11, in
from fiona.ogrext import Iterator, ItemsIterator, KeysIterator
ImportError: DLL load failed while importing ogrext: The specified procedure could not be found.

It seems that is linked (?) with GDAL (https://gis.stackexchange.com/questions/67372/fiona-importerror-dll-load-failed).

Any idea on how to solve it without complex processes?

Thanks

D.

[nmt28]

Hi Dimitris,

This looks like an incompatibility issue between GDAL and Fiona. Are you using a windows system? How do you manage your python installs/environment? Anaconda?

[dpoursanidis]

Win11 and Anaconda.
I see that the issue is due to what you describe.
What do you suggest (apart from linux movement :) )?

[nmt28]

It looks like certain versions of Fiona and GDAL are not compatible. Fiona 1.8.9 supports GDAL 3.0 so I would recommend a new env with these specific versions

[dpoursanidis]

I will test them and come back !

[dpoursanidis]

Following your advice and running the condia install fiona=1.8.9 i have that conflict

Package fiona conflicts for:
fiona=1.8.9
geopandas -> fiona

Am running now a step by step package installation to identify which is incompatible with the rest.

[nmt28]

Are you using the condo-forge channel? All packages in this channel should be compatible

[dpoursanidis]

Yeap, we use conda-forge.

It seems from the below that i need to create env with python > 3.6 and python < 3.7, right?

(bathymetry) C:\Users\DimitrisPoursanidis>conda install -c conda-forge fiona=1.8.9
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: /
Found conflicts! Looking for incompatible packages.
This can take several minutes. Press CTRL-C to abort.- |failed
UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:
Specifications:

• fiona=1.8.9 -> python[version='>=3.6,<3.7.0a0|>=3.8,<3.9.0a0|>=3.7,<3.8.0a0']
  Your python: python=3.9

[nmt28]

one thing to try would be to build an env on 3.9 and then do:

conda update --all

This sometimes resolves issues as it bring the latest (hopefully compatible) versions together

[dpoursanidis]

now something else appear

(bathymetry) D:\IC2data\C-SHELPh-main\C-SHELPh-main\4.Tutorial\code>python 1_test_env.py
Traceback (most recent call last):
File "D:\IC2data\C-SHELPh-main\C-SHELPh-main\4.Tutorial\code\1_test_env.py", line 24, in
raise e
File "D:\IC2data\C-SHELPh-main\C-SHELPh-main\4.Tutorial\code\1_test_env.py", line 4, in
from matplotlib.widgets import LassoSelector
File "C:\Users\DimitrisPoursanidis\anaconda3\envs\bathymetry\lib\site-packages\matplotlib_init_.py", line 113, in
from . import _api, _version, cbook, _docstring, rcsetup
File "C:\Users\DimitrisPoursanidis\anaconda3\envs\bathymetry\lib\site-packages\matplotlib\rcsetup.py", line 27, in
from matplotlib.colors import Colormap, is_color_like
File "C:\Users\DimitrisPoursanidis\anaconda3\envs\bathymetry\lib\site-packages\matplotlib\colors.py", line 51, in
from PIL import Image
File "C:\Users\DimitrisPoursanidis\anaconda3\envs\bathymetry\lib\site-packages\PIL\Image.py", line 100, in
from . import _imaging as core
ImportError: DLL load failed while importing _imaging: The specified module could not be found.

[dpoursanidis]

Hi

Did you find time to check it in windows machine?

D.

[nmt28]

It looks like it cannot import matplotlib.widgets.LassoSelector. This module is no longer used - it was used in an old method. You can remove:

from matplotlib.widgets import LassoSelector
from matplotlib.path import Path

Remove these lines and try again