Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/Users/lily/anaconda3/envs/mdanalysis/lib/python3.7/site-packages/MDAnalysis/core/groups.py", line 2278, in __getattr__

cls=self.__class__.__name__, attr=attr))
AttributeError: AtomGroup has no attribute elements

Traceback (most recent call last):


 "examples/point_env.py", line 26, in <module>

action, _ = policy.get_actions(observation)


 "/home/*/garage/src/garage/tf/misc/tensor_utils.py", line 11, in run

return sess.run(outputs, feed_dict=dict(list(zip(inputs, input_vals))))
AttributeError: 'NoneType' object has no attribute 'run'
