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https://github.com/pydata/xarray/issues/1849#issuecomment-489156658 https://api.github.com/repos/pydata/xarray/issues/1849 489156658 MDEyOklzc3VlQ29tbWVudDQ4OTE1NjY1OA== 12465248 2019-05-03T16:25:19Z 2019-05-03T16:40:52Z CONTRIBUTOR

Here's what I understand so far. For my file, i write it with ("ensured") and without ("unensured") the workaround (actually @markelg for discovering this).

(base) jamesmcc@cheyenne3[1021]:/glade/scratch/jamesmcc/florence_cutout_routelink_ensemble_run/ensemble> grep '_Storage' ensured_ncdsh.txt feature_id:_Storage = "contiguous" ; latitude:_Storage = "contiguous" ; longitude:_Storage = "contiguous" ; time:_Storage = "chunked" ; member:_Storage = "contiguous" ; crs:_Storage = "chunked" ; order:_Storage = "chunked" ; elevation:_Storage = "chunked" ; streamflow:_Storage = "chunked" ; q_lateral:_Storage = "chunked" ; velocity:_Storage = "chunked" ; Head:_Storage = "chunked" ; (base) jamesmcc@cheyenne3[1022]:/glade/scratch/jamesmcc/florence_cutout_routelink_ensemble_run/ensemble> grep '_Storage' unensured_ncdsh.txt feature_id:_Storage = "contiguous" ; latitude:_Storage = "contiguous" ; longitude:_Storage = "contiguous" ; time:_Storage = "chunked" ; member:_Storage = "contiguous" ; crs:_Storage = "chunked" ;

The error that is thrown is, just the tail end of it:

``` /glade/p/cisl/nwc/jamesmcc/anaconda3/lib/python3.7/site-packages/xarray/backends/netCDF4_.py in prepare_variable(self, name, variable, check_encoding, unlimited_dims) 466 least_significant_digit=encoding.get( 467 'least_significant_digit'), --> 468 fill_value=fill_value) 469 _disable_auto_decode_variable(nc4_var) 470

netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Dataset.createVariable()

netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Variable.init()

netCDF4/_netCDF4.pyx in netCDF4._netCDF4._ensure_nc_success()

RuntimeError: NetCDF: Invalid argument ```

If I go to line 464 in xarray/backends/netCDF4_.py, I see that the variable it is failing on is crs. If I

print(name) crs encoding.get('contiguous', False) True but the ncdump -sh shows it's actually chunked. I'm not sure this is exactly what's raising the error down the line, but these two things seem to be at odds.

My current question is "why does encoding.get('contiguous', False) return True?"

If you have any insights let me know. I probably wont have time to mess with this until next week. 

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