Hi John, Below is the traceback with the error. Thank you! --------------------------------------------------------------------------- TypeError Traceback (most recent call last) Cell In[1], line 2 1 import yt ----> 2 ds=yt.load("/Users/novita/Desktop/test_hdf5_chk_2396") File ~/Library/Python/3.12/lib/python/site-packages/yt/_maintenance/deprecation.py:69, in future_positional_only.<locals>.outer.<locals>.inner(*args, **kwargs) 60 value = kwargs[name] 61 issue_deprecation_warning( 62 f"Using the {name!r} argument as keyword (on position {no}) " 63 "is deprecated. " (...) 67 **depr_kwargs, 68 ) ---> 69 return func(*args, **kwargs) File ~/Library/Python/3.12/lib/python/site-packages/yt/loaders.py:144, in load(fn, hint, *args, **kwargs) 136 if missing := cls._missing_load_requirements(): 137 warnings.warn( 138 f"This dataset appears to be of type {cls.__name__}, " 139 "but the following requirements are currently missing: " (...) 142 stacklevel=3, 143 ) --> 144 return cls(fn, *args, **kwargs) 146 if len(candidates) > 1: 147 raise YTAmbiguousDataType(_input_fn, candidates) File ~/Library/Python/3.12/lib/python/site-packages/yt/frontends/flash/data_structures.py:206, in FLASHDataset.__init__(self, filename, dataset_type, storage_filename, particle_filename, units_override, unit_system, default_species_fields) 204 # Check if the particle file has the same time 205 if self._particle_handle != self._handle: --> 206 part_time = self._particle_handle.handle.get("real scalars")[0][1] 207 plot_time = self._handle.handle.get("real scalars")[0][1] 208 if not np.isclose(part_time, plot_time): TypeError: 'NoneType' object is not subscriptable