Hello all, yt has some of the greatest plotting capabilities, and I greatly enjoy working with yt! Recently I have begun to work with hdf5 data from a large scale galaxy simulation (illustris) and I was wondering how I can work with the data, is there a general munging procedure for getting it into the correct yt format? When I try to plot import yt ds = yt.load("Groups_hdf5_plt_cnt_0150") yt.SlicePlot(ds, 'x', "density", width = (800.0, 'kpc')).save() yt.SlicePlot(ds, 'y', "density", width = (800.0, 'kpc')).save() yt.SlicePlot(ds, 'z', "density", width = (800.0, 'kpc')).save() I get the following error: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/yt/frontends/gadget_fof/data_structures.pyc in _parse_parameter_file(self) * 151* self.periodicity = (True, True, True) * 152* self.current_redshift = hvals["Redshift"] --> 153 self.omega_lambda = hvals["OmegaLambda"] * 154* self.omega_matter = hvals["Omega0"] * 155* self.hubble_constant = hvals["HubbleParam"] KeyError: 'OmegaLambda' I am guessing this is because the field entries do not match up. Any help is much appreciated! Dan