Hi,
I encountered a problem when processing BoxLib (Nyx) data from pure hydro simulations without particles, using an Anaconda installation of yt.
After loading a dataset with yt.load(), I get the following error for ds.field_list:
--------------------------------------------------------------------------- KeyError Traceback (most recent call last) <ipython-input-5-5aaf470c0415> in<module>() ----> 1ds.field_list/sw/tools/anaconda3/4.1.1/generic/lib/python3.5/site-packages/yt/data_objects/static_output.py in field_list(self) 459 @property460 def field_list(self):--> 461return self.index.field_list462 463 def create_field_info(self):/sw/tools/anaconda3/4.1.1/generic/lib/python3.5/site-packages/yt/data_objects/static_output.py in index(self) 417 raise RuntimeError("You should not instantiate Dataset.")418 self._instantiated_index = self._index_class( --> 419self, dataset_type=self.dataset_type) 420 # Now we do things that we need an instantiated index for421 # ...first off, we create our field_info now./sw/tools/anaconda3/4.1.1/generic/lib/python3.5/site-packages/yt/frontends/boxlib/data_structures.py in __init__(self, ds, dataset_type) 906 def __init__(self, ds, dataset_type='nyx_native'):907 super(NyxHierarchy, self).__init__(ds, dataset_type)--> 908self._read_particle_header()909 910 def _read_particle_header(self):/sw/tools/anaconda3/4.1.1/generic/lib/python3.5/site-packages/yt/frontends/boxlib/data_structures.py in _read_particle_header(self) 909 910 def _read_particle_header(self):--> 911if not self.ds.parameters["particles"]:912 self.pgrid_info = np.zeros((self.num_grids, 3), dtype='int64')913 returnKeyError: 'particles'
Same problem with slices. I am not sure what exactly causes the error here, but since I can load datasets from cosmological simulations with Nyx and process them without problems, I suppose the problem outlined above is somehow related to the missing particles.
How can this be fixed?
Best Wolfram