netCDF dependency issue for anaconda package

[David Brockley]

Hello

When creating a conda environment that includes pyfes and some other packages from conda-forge, libnetcdf 4.7.4 is used (latest on conda-forge). This provides libnetcdf.so.18 which causes the following error at import time for pyfes:

ImportError: libnetcdf.so.15: cannot open shared object file: No such file or directory

pyfes requires libnetcdf.so.15 which is supplied by libnetcdf 4.7.3. If I require exactly that version of libnetcdf in the YAML file I am using to build the environment, pyfes imports without errors.

I think this means that the index.json file for pyfes needs to require exactly 4.7.3 rather than >=4.7.3,<5.0a0 but I don’t know enough about how anaconda handles dependencies to be sure.

Best regards, David

[Itinerant Oceanographer]

As mentioned elsewhere, I got the following to work:

conda create -n tides python=3.7
conda activate tides
conda install jupyter python=3.7 ipython notebook
conda install libnetcdf=4.6.1 netCDF4 matplotlib numpy cartopy
conda install -c fbriol fes

I suspect, as noted above, there are later versions that are still compatible, but I haven’t chased it to the last possible dependency.