System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04):Ubuntu 16.04
• Ray installed from (source or binary): pip install ray
• Ray version: 0.3.1
• Python version: 2.7.12
• Exact command to reproduce:

Describe the problem

I just ran the custom_env.py which describes the simple corridor but there was a bug as follows. I don't know how to solve it. I hope for your help. Thank you very much!

Source code / logs

Traceback (most recent call last):
File "/home/h/ray-master/examples/custom_env/custom_env.py", line 54, in
"corridor_length": 5,
File "/home/h/.virtualenvs/ros_gazebo/local/lib/python2.7/site-packages/ray/tune/tune.py", line 63, in run_experiments
raise TuneError("Trial did not complete", trial)
ray.tune.error.TuneError: ('Trial did not complete', PPO_corridor_0)