Can't find eccodes.dll

[jnapoliFEP]

Conda/pip install not working on Windows 11? After running install, receiving error message: cannot load library eccodes.dll. I added path to environment variables and tried numerous other options in different discussion forums ...

[williamhobbs]

Did you install with pip or with conda? I can't get pip to work on Windows, but conda works fine. It looks like ECMWF only distributes Windows binaries for eccodes on conda-forge, so to use pip you either have to compile it yourself or find unofficial binaries.

I use miniforge and running the following in the Miniforge Prompt works for me:

conda create -n herbie_test_env python=3.12 -y
conda activate herbie_test_env
conda install -c conda-forge herbie-data

The regular Anaconda channel/repo might not work, so if you are using conda via Anaconda, you may have to specify the conda-forge channel (with -c conda-forge in the above commands). conda via Miniforge only uses the conda-forge channel, so I think it's optional to specify the channel in that case. I don't have Anaconda, so I'm just guessing on this...

[jnapoliFEP]

Ty! I am using miniforge and that did the trick, appreciate the help!

[aniruddhaadak80]

Hi @jnapoliFEP ,

Hey there! Sorry to hear you're having trouble with eccodes.dll on Windows 11. Here are a few things you can try:

1. Check Installation: Make sure eccodes installed correctly. Run conda list eccodes or pip show eccodes to confirm.

2. Update PATH: Ensure the folder containing eccodes.dll is in your PATH. You can add it via System Properties > Environment Variables.

3. Use Anaconda Prompt: If you're using Anaconda, try running your script from the Anaconda Prompt instead of the regular Command Prompt.

4. Reinstall: Sometimes a reinstall helps. Try:

   conda uninstall eccodes
   conda install -c conda-forge eccodes

5. Check Architecture: Ensure your Python version matches the architecture (32-bit or 64-bit) of eccodes.dll.

This might helps .

Thank you .

[jnapoliFEP]

Ty, out of curiosity I will give this a try on my existing environment