[IPython-User] Notebook doesn't produce output

[Ullrich Koethe]

Hi Fernando and Benjamin,

thanks for your suggestions.

 >>
 >> How can I proceed to fix the problem?
 >
 > This is odd, as the other info you provide seems to indicate that
 > the zmq machinery is working fine.  A few things to help debug:
 >
 > - could you also try with chrome, just to be sure it's not a browser
 > thing?
 >

I tried chrome 17.0.963.46 m, and it didn't work either. The javascript 
console says:

Starting WS: 
ws://127.0.0.1:8888/kernels/c9eac7c8-c15c-4cdb-8ed9-4d6df5e77e37
Kernel started:  c9eac7c8-c15c-4cdb-8ed9-4d6df5e77e37
event.layerX and event.layerY are broken and deprecated in WebKit. They 
will be removed from the engine in the near future.

 > - hit reload on the notebook page (not just the dashboard) to ensure
 > there's no cached  javascript around by chance.
 >

The javascript console displays an error message, see below.

 > - what version of tornado and pyzme are you using?  You can see both
 > with:
 >

import tornado, zmq

tornado.version
Out[28]: '2.2'

zmq.__version__
Out[29]: '2.1.10'

 > The first place to look is always the javascript console (Tools/Web
 > Developer/Error Console in FF).  It is likely there was an error
 > reported there.

There are many CSS warnings when I open the dashboard or a new notebook, 
but no errors. When I type or execute a command, nothing appears on the 
console (neither error nor warning). However, when I reload the notebook 
page I get:

Fehler: Die Verbindung zu 
ws://127.0.0.1:8888/kernels/a9a26480-6400-4184-ae62-ad1b0e40a5f5/shell 
wurde unterbrochen, während die Seite geladen wurde.
Quelldatei: http://127.0.0.1:8888/static/js/kernel.js
Zeile: 124

Fehler: Die Verbindung zu 
ws://127.0.0.1:8888/kernels/a9a26480-6400-4184-ae62-ad1b0e40a5f5/iopub 
wurde unterbrochen, während die Seite geladen wurde.
Quelldatei: http://127.0.0.1:8888/static/js/kernel.js
Zeile: 125

(english: connection lost while loading the page)

The same happens when I close the notebook page or press "Restart kernel".

After closing the notebook, I additionaly get:

Error: attempt to run compile-and-go script on a cleared scope
Quelldatei: http://127.0.0.1:8888/static/js/kernel.js
Zeile: 140

I also tried to run Firefox with add-ons disabled, but to no avail.

Best regards
Ulli