issue_comments: 719053278

I have also tried a clean install in a fresh conda environment with python 3.7, and receive this traceback now upon calling xr.open_dataset(f), which previously at least was able to read the metadata. output of xr.show_versions() below that.

```

RuntimeError Traceback (most recent call last) <ipython-input-16-de78b6c36cbe> in <module> 1 # ds = xr.open_dataset(f.replace('.hdf', '.h4')) ----> 2 ds = xr.open_dataset(f) 3 ds['B01'].values

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\backends\api.py in open_dataset(filename_or_obj, group, decode_cf, mask_and_scale, decode_times, autoclose, concat_characters, decode_coords, engine, chunks, lock, cache, drop_variables, backend_kwargs, use_cftime, decode_timedelta) 543 544 with close_on_error(store): --> 545 ds = maybe_decode_store(store) 546 547 # Ensure source filename always stored in dataset object (GH issue #2550)

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\backends\api.py in maybe_decode_store(store, lock) 457 drop_variables=drop_variables, 458 use_cftime=use_cftime, --> 459 decode_timedelta=decode_timedelta, 460 ) 461

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\conventions.py in decode_cf(obj, concat_characters, mask_and_scale, decode_times, decode_coords, drop_variables, use_cftime, decode_timedelta) 580 encoding = obj.encoding 581 elif isinstance(obj, AbstractDataStore): --> 582 vars, attrs = obj.load() 583 extra_coords = set() 584 file_obj = obj

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\backends\common.py in load(self) 110 """ 111 variables = FrozenDict( --> 112 (_decode_variable_name(k), v) for k, v in self.get_variables().items() 113 ) 114 attributes = FrozenDict(self.get_attrs())

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\backends\netCDF4_.py in get_variables(self) 398 def get_variables(self): 399 dsvars = FrozenDict( --> 400 (k, self.open_store_variable(k, v)) for k, v in self.ds.variables.items() 401 ) 402 return dsvars

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\core\utils.py in FrozenDict(args, kwargs) 440 441 def FrozenDict(args, kwargs) -> Frozen: --> 442 return Frozen(dict(*args, kwargs)) 443 444

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\backends\netCDF4_.py in <genexpr>(.0) 398 def get_variables(self): 399 dsvars = FrozenDict( --> 400 (k, self.open_store_variable(k, v)) for k, v in self.ds.variables.items() 401 ) 402 return dsvars

C:\software\Anaconda3\envs\x-python\lib\site-packages\xarray\backends\netCDF4_.py in open_store_variable(self, name, var) 374 # netCDF4 specific encoding; save _FillValue for later 375 encoding = {} --> 376 filters = var.filters() 377 if filters is not None: 378 encoding.update(filters)

netCDF4_netCDF4.pyx in netCDF4._netCDF4.Variable.filters()

netCDF4_netCDF4.pyx in netCDF4._netCDF4._ensure_nc_success()

RuntimeError: NetCDF: Attempting netcdf-4 operation on netcdf-3 file ```

xr.show_versions():

INSTALLED VERSIONS

commit: None python: 3.7.8 | packaged by conda-forge | (default, Jul 31 2020, 01:53:57) [MSC v.1916 64 bit (AMD64)] python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None libhdf5: 1.10.6 libnetcdf: 4.7.4

xarray: 0.16.1 pandas: 1.1.3 numpy: 1.19.2 scipy: 1.5.2 netCDF4: 1.5.4 pydap: None h5netcdf: None h5py: None Nio: None zarr: None cftime: 1.2.1 nc_time_axis: None PseudoNetCDF: None rasterio: 1.1.7 cfgrib: None iris: None bottleneck: None dask: None distributed: None matplotlib: 3.3.2 cartopy: None seaborn: 0.11.0 numbagg: None pint: None setuptools: 49.6.0.post20201009 pip: 20.2.4 conda: None pytest: None IPython: 7.18.1 sphinx: None