Standalone IPython notebook crashes on EDP's Canopy without network connection - ipython

Question

When I try to start the ipython notebook from EPD's Canopy while not connected to the Internet, the notebook crashes before starting up.
This does not happen when connected to the net.
Any help would be most welcome.
The short crash dump follows next. The full dump from setting c.Application.verbose_crash=True in the config file can be found here https://gist.github.com/xaverm/6873969
Short dump
~>.Canopy/EPDenvironment/bin/ipython notebook
[NotebookApp] Using existing profile dir: u'/home/xuserx/.ipython/profile_default'
[NotebookApp] Serving notebooks from /home/xuserx
Traceback (most recent call last):
File ".Canopy/EPDenvironment/bin/ipython", line 10, in <module>
sys.exit(launch_new_instance())
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/frontend/terminal/ipapp.py", line 401, in launch_new_instance
app.initialize()
File "<string>", line 2, in initialize
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, *args, **kwargs)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/frontend/terminal/ipapp.py", line 313, in initialize
super(TerminalIPythonApp, self).initialize(argv)
File "<string>", line 2, in initialize
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, *args, **kwargs)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/core/application.py", line 325, in initialize
self.parse_command_line(argv)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/frontend/terminal/ipapp.py", line 308, in parse_command_line
return super(TerminalIPythonApp, self).parse_command_line(argv)
File "<string>", line 2, in parse_command_line
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, *args, **kwargs)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 420, in parse_command_line
return self.initialize_subcommand(subc, subargv)
File "<string>", line 2, in initialize_subcommand
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, *args, **kwargs)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 359, in initialize_subcommand
self.subapp.initialize(argv)
File "<string>", line 2, in initialize
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, *args, **kwargs)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/frontend/html/notebook/notebookapp.py", line 532, in initialize
self.init_webapp()
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/IPython/frontend/html/notebook/notebookapp.py", line 450, in init_webapp
self.http_server.listen(port, self.ip)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/tornado/netutil.py", line 100, in listen
sockets = bind_sockets(port, address=address)
File "/home/xuserx/.Canopy/EPDenvironment/lib/python2.7/site-packages/tornado/netutil.py", line 248, in bind_sockets
0, flags)):
gaierror: [Errno -9] Address family for hostname not supported

Answer 1

This issue should be considerd closed: even after a complete Canopy reinstall & update, standalone ipython notebooks started from out of the directory generated by ~/Canopy/canopy_cli setup, as described on http://docs.enthought.com/canopy/configure/canopy-cli.html still do crash if the host is not connected to a network. However the ipython notebook started from .Canopy/Enthought/Canopy_64bit/User/bin/ipython now works also if disconnected from a network. That's ok. for me.