New issue 765: ('gas', 'Dark_Matter_Density') fails to load https://bitbucket.org/yt_analysis/yt/issue/765/gas-dark_matter_density-fails... Nathan Goldbaum: I ran into this while trying to load all of the fields in `pf.h.field_list`. The following script illustrates the issue: ``` from yt.mods import * pf = load("IsolatedGalaxy/galaxy0030/galaxy0030") print pf.h.field_list[0] pf.h.all_data()[pf.h.field_list[0]] ``` on the current tip of yt-3.0 (b3e969705199), this outputs: ``` ('gas', 'Dark_Matter_Density') Traceback (most recent call last): File "test2.py", line 4, in <module> pf.h.all_data()[pf.h.field_list[0]] File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 191, in __getitem__ self.get_data(f) File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 582, in get_data self._generate_fields(fields_to_generate) File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 598, in _generate_fields self.field_data[field] = self._generate_field(field) File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 221, in _generate_field tr = self._generate_fluid_field(field) File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 239, in _generate_fluid_field rv = self._generate_spatial_fluid(field, ngt_exception.ghost_zones) File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 252, in _generate_spatial_fluid preload_fields = deps)): File "/Users/goldbaum/Documents/yt-hg/yt/data_objects/data_containers.py", line 486, in chunks for chunk in self.hierarchy._chunk(self, chunking_style, **kwargs): File "/Users/goldbaum/Documents/yt-hg/yt/geometry/grid_geometry_handler.py", line 280, in _chunk_spatial for i, og in enumerate(giter): File "/Users/goldbaum/Documents/yt-hg/yt/geometry/geometry_handler.py", line 694, in next chunk, self.preload_fields) or {} File "/Users/goldbaum/Documents/yt-hg/yt/frontends/enzo/io.py", line 175, in _read_chunk_data dg = h5py.h5d.open(fid, "/Grid%08i/%s" % (g.id, fname)) File "h5d.pyx", line 80, in h5py.h5d.open (h5py/h5d.c:1728) KeyError: 'not found (Dataset: Object not found)' ``` This issue appears to be fixed in the unitrefactor, so it may not be worth worrying about too much. Something to keep in mind though.