Dear yt users, I am trying to make covering_grid from an enzo simulation. The code is very simple: (somewhat sloppy since it's running with ipython. ) ds=yt.load("data0201") ad_c=ds.covering_grid(level=3, left_edge=0.4375, dims=[64,64,64]) ad_c["x"] where the ad_c["x"] will give an Index Error on my desktop. However, the same piece of code runs great in a different machine. The version of yt are the same in both machines, which is 3.0.2. Both of them installed yt through anaconda. The error message I got was following. Thanks for your help! --------------------------------------------------------------------------- IndexError Traceback (most recent call last) <ipython-input-6-ff78a8bccc54> in <module>() ----> 1 ad_c["x"] /home/fxyang/software/anaconda/lib/python2.7/site-packages/yt/data_objects/data_containers.pyc in __getitem__(self, key) 243 if f in self._container_fields: 244 self.field_data[f] = \ --> 245 self.ds.arr(self._generate_container_field(f)) 246 return self.field_data[f] 247 else: /home/fxyang/software/anaconda/lib/python2.7/site-packages/yt/data_objects/construction_data_containers.pyc in _generate_container_field(self, field) 587 np.multiply(rv, self.dds[2], rv) 588 elif field == ("index", "x"): --> 589 x = np.mgrid[self.left_edge[0] + 0.5*self.dds[0]: 590 self.right_edge[0] - 0.5*self.dds[0]: 591 self.ActiveDimensions[0] * 1j] /home/fxyang/software/anaconda/lib/python2.7/site-packages/yt/units/yt_array.pyc in __getitem__(self, item) 981 982 def __getitem__(self, item): --> 983 ret = super(YTArray, self).__getitem__(item) 984 if ret.shape == (): 985 return YTQuantity(ret, self.units) IndexError: too many indices for array -- Best, Haifeng