File "slice_gravity.py", line 104, in <module>
    slc =yt.SlicePlot(ds,axislist[i],varlist[i],origin="center-domain")
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/visualization/plot_window.py", line 2137, in SlicePlot
    return AxisAlignedSlicePlot(ds, normal, fields, *args, **kwargs)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/visualization/plot_window.py", line 1275, in __init__
    slc.get_data(fields)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 643, in get_data
    self.index._identify_base_chunk(self)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 143, in index
    self._index = self.ds.index
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/static_output.py", line 326, in index
    self.create_field_info()
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/static_output.py", line 380, in create_field_info
    self.field_info.load_all_plugins()
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/field_info_container.py", line 241, in load_all_plugins
    self.find_dependencies(loaded)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/field_info_container.py", line 254, in find_dependencies
    deps, unavailable = self.check_derived_fields(loaded)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/field_info_container.py", line 323, in check_derived_fields
    fd = fi.get_dependencies(ds = self.ds)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/derived_field.py", line 163, in get_dependencies
    e[self.name]
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/field_detector.py", line 113, in __missing__
    vv = finfo(self)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/derived_field.py", line 189, in __call__
    dd = self._function(self, data)
  File "slice_gravity.py", line 37, in _GradientY
    Gy = -1.0*data["gravitational_potential_gradient_y"]
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/fields/field_detector.py", line 93, in __missing__
    finfo = self.ds._get_field_info(*field)
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/static_output.py", line 543, in _get_field_info
    raise YTFieldNotFound((ftype, fname), self)
yt.utilities.exceptions.YTFieldNotFound: Could not find field '('all', 'gravitational_potential_gradient_y')' in super3d_hdf5_plt_cnt_0000.
[c557-303.stampede.tacc.utexas.edu:mpispawn_0][child_handler] MPI process (rank: 0, pid: 67268) exited with status 1
TACC: MPI job exited with code: 1