[yt-users] Exodus file Couldn't figure out output type

[Jaron Senecal]

Hi,
I just installed yt and immediately ran into the following problem. The 
following script

#viz1.py
import yt
from yt.mods import *
ds = yt.load("stnd_2d_out.e", step=-1)

gives this error:

yt : [ERROR    ] 2017-11-21 09:34:33,950 Couldn't figure out output type 
for stnd_2d_out.e
Traceback (most recent call last):
   File "viz1.py", line 27, in <module>
     ds = yt.load("stnd_2d_out.e", step=-1)
   File 
"/home/jaron/.conda/envs/py36/lib/python3.6/site-packages/yt/convenience.py", 
line 98, in load
     raise YTOutputNotIdentified(args, kwargs)
yt.utilities.exceptions.YTOutputNotIdentified: Supplied 
('stnd_2d_out.e',) {'step': -1}, but could not load!

Please let me know how to resolve this.
-Jaron