>
> I'm doing the same, and getting the same errors, but using Google Drive. 
>>
>> I can say that the symlink probably isn't the problem, since I just 
>> created a different notebook in my GDrive folder, pointed sage toward it.  
>>
>> So.... Can anybody find the problem here? Is sage maybe storing a global 
>> file that tells it what notebooks exist? Anybody? 
>>
>>
>>
This has come up again a few times.

http://ask.sagemath.org/question/26736/500-internal-server-error-mac-os-109/
http://ask.sagemath.org/question/9845/running-sage-notebook-files-across-multiple-platforms-via-dropbox/

Is there anyone who knows exactly under what circumstances it appears that 
the DOT_SAGENB 
folder will be created (well, try and fail)?

http://ask.sagemath.org/question/9126/running-sage-with-files-on-dropbox/
 

>
>> On Tuesday, November 6, 2012 2:40:40 AM UTC-5, Laurent Decreusefond wrote:
>>>
>>> Hi all,
>>>
>>> I have several Mac each of them with its own instance of SAGE and I used 
>>> to share my notebooks via a symlink to a directory on Dropbox : each .sage 
>>> directory on each machine had sage_notebook.sagenb symlinked to a directory 
>>> on my dropbox. It worked well under version 5.0. Now I get the error below. 
>>> I hoped that it would be solved with further versions but not yet.  What 
>>> did change in SAGE and what could I do now ?
>>>
>>>
>>>
>>>
>>> 2012-11-06 08:33:59+0100 [-] Log opened.
>>> 2012-11-06 08:33:59+0100 [-] twistd 12.1.0 
>>> (/Applications/sage/local/bin/python 2.7.3) starting up.
>>> 2012-11-06 08:33:59+0100 [-] reactor class: 
>>> twisted.internet.selectreactor.SelectReactor.
>>> 2012-11-06 08:33:59+0100 [-] QuietSite starting on 8080
>>> 2012-11-06 08:33:59+0100 [-] Starting factory <__builtin__.QuietSite 
>>> instance at 0x10ce05878>
>>> 2012-11-06 08:33:59+0100 [-] WSGI application error
>>> Traceback (most recent call last):
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-macosx-10.6-x86_64.egg/twisted/python/threadpool.py",
>>>  
>>> line 190, in _worker
>>>     o = self.q.get()
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-macosx-10.6-x86_64.egg/twisted/python/context.py",
>>>  
>>> line 118, in callWithContext
>>>     return self.currentContext().callWithContext(ctx, func, *args, **kw)
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-macosx-10.6-x86_64.egg/twisted/python/context.py",
>>>  
>>> line 83, in callWithContext
>>>     self.contexts.pop()
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-macosx-10.6-x86_64.egg/twisted/web/wsgi.py",
>>>  
>>> line 340, in run
>>>     self.started = True
>>> --- <exception caught here> ---
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Twisted-12.1.0-py2.7-macosx-10.6-x86_64.egg/twisted/web/wsgi.py",
>>>  
>>> line 315, in run
>>>     appIterator = self.application(self.environ, self.startResponse)
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py",
>>>  
>>> line 1701, in __call__
>>>     return self.wsgi_app(environ, start_response)
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py",
>>>  
>>> line 1689, in wsgi_app
>>>     response = self.make_response(self.handle_exception(e))
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py",
>>>  
>>> line 1687, in wsgi_app
>>>     response = self.full_dispatch_request()
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py",
>>>  
>>> line 1360, in full_dispatch_request
>>>     rv = self.handle_user_exception(e)
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py",
>>>  
>>> line 1358, in full_dispatch_request
>>>     rv = self.dispatch_request()
>>>   File 
>>> "/Applications/sage/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py",
>>>  
>>> line 1344, in dispatch_request
>>>     return self.view_functions[rule.endpoint](**req.view_args)
>>>   File "/Applications/sage/devel/sagenb/flask_version/decorators.py", 
>>> line 27, in wrapper
>>>     return f(*args, **kwds)
>>>   File 
>>> "/Applications/sage/devel/sagenb/flask_version/worksheet_listing.py", line 
>>> 88, in home
>>>     return render_worksheet_list(request.args, pub=False, 
>>> username=username)
>>>   File 
>>> "/Applications/sage/devel/sagenb/flask_version/worksheet_listing.py", line 
>>> 50, in render_worksheet_list
>>>     search=search, reverse=reverse)
>>>   File "/Applications/sage/devel/sagenb/sagenb/notebook/notebook.py", 
>>> line 1277, in worksheet_list_for_user
>>>     X = self.get_worksheets_with_viewer(user)
>>>   File "/Applications/sage/devel/sagenb/sagenb/notebook/notebook.py", 
>>> line 1455, in get_worksheets_with_viewer
>>>     if self._user_manager.user_is_admin(username): return 
>>> self.get_all_worksheets()
>>>   File "/Applications/sage/devel/sagenb/sagenb/notebook/notebook.py", 
>>> line 1450, in get_all_worksheets
>>>     for w in self.users_worksheets(username):
>>>   File "/Applications/sage/devel/sagenb/sagenb/notebook/notebook.py", 
>>> line 367, in users_worksheets
>>>     worksheets = self.__storage.worksheets(username)
>>>   File 
>>> "/Applications/sage/devel/sagenb/sagenb/storage/filesystem_storage.py", 
>>> line 596, in worksheets
>>>     path = self._abspath(self._user_path(username))
>>>   File 
>>> "/Applications/sage/devel/sagenb/sagenb/storage/filesystem_storage.py", 
>>> line 115, in _user_path
>>>     os.rename(path, new_path)
>>> exceptions.OSError: [Errno 66] Directory not empty
>>>  
>>

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