I ran leoLauncher.py --ipython and everything seemed to work: the ipython 
window popped up and no error messages. Just this comment in the startup 
terminal: 


[IPKernelApp] To connect another client to this kernel, use:

[IPKernelApp] --existing kernel-16687.json

When I tried to run some code from Leo (alt-I), I got an error (see 
traceback below). But if I continued, sometimes printing would appear, and 
sometimes I had to hit enter in the ipython console to get a line to print. 
The function definitions did not seem to go at all. 


Any suggestions?


I am using the bzr version of Leo only, on Ubuntu Precise, python 2.7 : Leo 
4.11 devel, build 5752, 2013-04-26 23:46:30

exception executing command
Traceback (most recent call last):
  File "/data2/Soft/leo-editor/trunk3/leo/core/leoCommands.py", line 560, 
in doCommand
    val = command(event)
  File "/data2/Soft/leo-editor/trunk3/leo/core/leoCommands.py", line 1170, 
in minibufferCallback
    retval = function(keywords)
  File "/data2/Soft/leo-editor/trunk3/leo/core/leoIPython.py", line 876, in 
pushToIPythonCommand
    startIPython(event=event)
  File "/data2/Soft/leo-editor/trunk3/leo/core/leoIPython.py", line 864, in 
startIPython
    g_ipm.start_new_api()
  File "/data2/Soft/leo-editor/trunk3/leo/core/leoIPython.py", line 289, in 
start_new_api
    ipapp.launch_new_instance()
  File 
"/usr/lib/python2.7/dist-packages/IPython/frontend/terminal/ipapp.py", line 
401, in launch_new_instance
    app = TerminalIPythonApp.instance()
  File "/usr/lib/python2.7/dist-packages/IPython/config/configurable.py", 
line 329, in instance
    '%s are being created.' % cls.__name__
MultipleInstanceError: Multiple incompatible subclass instances of 
TerminalIPythonApp are being created.

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