Traceback (most recent call last):
  File "hdf52cube.py", line 10, in ?
    poissonsolver=PoissonSolver(),
  File "/home/camp/askhl/gpaw-hdf5/gpaw/paw.py", line 116, in __init__
    self.initialize()
  File "/home/camp/askhl/gpaw-hdf5/gpaw/paw.py", line 587, in initialize
    self.density.set_mixer(par.mixer)
  File "/home/camp/askhl/gpaw-hdf5/gpaw/density.py", line 325, in set_mixer
    self.mixer.initialize(self)
  File "/home/camp/askhl/gpaw-hdf5/gpaw/mixer.py", line 206, in initialize
    mixer.initialize_metric(density.gd)
  File "/home/camp/askhl/gpaw-hdf5/gpaw/mixer.py", line 69, in initialize_metric
    self.mR_G = gd.empty()
  File "/home/camp/askhl/gpaw-hdf5/gpaw/grid_descriptor.py", line 178, in empty
    return self._new_array(n, dtype, False, global_array, pad)
  File "/home/camp/askhl/gpaw-hdf5/gpaw/grid_descriptor.py", line 195, in _new_array
    return np.empty(shape, dtype)
ValueError: negative dimensions are not allowed
GPAW CLEANUP for serial binary: exceptions.ValueError occured. Calling sys.exit()