Hi,

It's been a little while since I last used a jupyter notebook, but when I 
last did it worked fine.  However now when I try to start one I get:
> jupyter notebook
[I 12:47:24.487 NotebookApp] Serving notebooks from local directory: 
/export/slavin/FLASH/mmsnr
[I 12:47:24.488 NotebookApp] 0 active kernels 
[I 12:47:24.488 NotebookApp] The IPython Notebook is running at: 
http://localhost:8888/
[I 12:47:24.488 NotebookApp] Use Control-C to stop this server and shut 
down all kernels (twice to skip confirmation).
Traceback (most recent call last):
  File "/export/slavin/python/anaconda/bin/jupyter-notebook", line 6, in 
<module>
    sys.exit(main())
  File 
"/export/slavin/python/anaconda/lib/python2.7/site-packages/jupyter_core/application.py",
 
line 267, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File 
"/export/slavin/python/anaconda/lib/python2.7/site-packages/traitlets/config/application.py",
 
line 589, in launch_instance
    app.start()
  File 
"/export/slavin/python/anaconda/lib/python2.7/site-packages/notebook/notebookapp.py",
 
line 1089, in start
    self.io_loop = ioloop.IOLoop.current()
AttributeError: type object 'IOLoop' has no attribute 'current'

and in my chrome browser I get a page that says:
"This site can’t be reached

localhost refused to connect.
Try:
Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_REFUSED"

I figure that the python error is caused by the connection being refused.

I've checked my proxy settings and those are fine.  I asked and my sysadmin 
turned off my firewall.  Same result.
I'm running on CentOS 6.8 and using an anaconda install of python 2.7.11 
and jupyter 4.0.6.  My chrome version is 57.0.2987.98.  Thanks in advance 
for any help you can offer.

Regards,
Jon

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