issue_comments: 782258574

@Tinkaa I looked into this a bit more and I suspect the way you are installing packages (conda, pip?) is important to bring in compatible libnetcdf behind the scenes (You're xr.show_versions() shows new libnetcdf: 4.7.4 but older netCDF4: 1.5.0.1 making me think you installed and older version netcdf into an existing environment without any dependency resolution).

This works for me on mac0S: conda create -c conda-forge -n opendap_working python xarray netcdf4==1.5.1 matplotlib Note that I found the explicit pin important. Perhaps because it brings in libnetcdf=4.6.2 behind the scenes? Here is my full list of working versions:

``` INSTALLED VERSIONS

commit: None python: 3.7.10 | packaged by conda-forge | (default, Feb 19 2021, 15:59:12) [Clang 11.0.1 ] python-bits: 64 OS: Darwin OS-release: 20.3.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 libhdf5: 1.10.4 libnetcdf: 4.6.2

xarray: 0.16.2 pandas: 1.2.2 numpy: 1.20.1 scipy: None netCDF4: 1.5.0.1 pydap: None h5netcdf: None h5py: None Nio: None zarr: None cftime: 1.4.1 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: None distributed: None matplotlib: 3.3.4 cartopy: None seaborn: None numbagg: None pint: None setuptools: 49.6.0.post20210108 pip: 21.0.1 conda: None pytest: None IPython: None sphinx: None ```

Hopefully some folks that know more about opendap could chime in (@dopplershift, @rabernat ?) to help get to the root of this issue. For what it's worth, I noticed this additional log output that wasn't surfaced in the jupyter notebook in addition to the original traceback i posted: oc_open: server error retrieving url: code=3 message="The identifier `tmax.tmax%5b0%5d%5b0:3:620%5d%5b0:3:1404%5d' is not in the dataset."oc_open: server error retrieving url: code=3 message="The identifier `tmax.tmax%5b0%5d%5b0:3:620%5d%5b0:3:1404%5d' is not in the dataset."oc_open: server error retrieving url: code=3 message="The identifier `tmax.tmax%5b0%5d%5b0:3:620%5d%5b0:3:1404%5d' is not in the dataset."oc_open: server error retrieving url: code=3 message="The identifier `tmax.tmax%5b0%5d%5b0:3:620%5d%5b0:3:1404%5d' is not in the dataset." oc_open: server error retrieving url: code=3 message="The identifier `tmax.tmax%5b0%5d%5b0:3:620%5d%5b0:3:1404%5d' is not in the dataset."^CTraceback (most recent call last): File "/Users/scott/miniconda3/envs/opendap_test/lib/python3.9/site-packages/xarray/backends/common.py", line 52, in robust_getitem return array[key] File "src/netCDF4/_netCDF4.pyx", line 4420, in netCDF4._netCDF4.Variable.__getitem__ File "src/netCDF4/_netCDF4.pyx", line 5363, in netCDF4._netCDF4.Variable._get File "src/netCDF4/_netCDF4.pyx", line 1950, in netCDF4._netCDF4._ensure_nc_success RuntimeError: NetCDF: file not found