Regarding the bug, Justas has more details about the problem... he seen it
happen and actually did some debug about it here in Portugal.

2012/6/1 Gediminas Paulauskas <email address hidden>

> I cannot reproduce the exact same failure with the attached database,
> but my guess is that you hit the Bug #1003834 that was recently reported
> as https://answers.launchpad.net/schooltool/+question/198155
>
> The indication is that at the end of /var/log/schooltool/error.log there
> is an error:
>
> AttributeError: 'Timetable' object has no attribute 'uniqueMeetingId'
>
> However, with your database I got an error in the next stage of upgrade,
>
> 2012-06-01 17:09:58,130 main db/schooltool: failed to evolve to generation
> 37
> Traceback (most recent call last):
>   File
> "/home/menesis/.buildout/eggs/zope.app.generations-3.6.1-py2.7.egg/zope/app/generations/generations.py",
> line 494, in evolve
>    manager.evolve(context, generation)
>  File
> "/home/menesis/.buildout/eggs/zope.app.generations-3.6.1-py2.7.egg/zope/app/generations/generations.py",
> line 145, in evolve
>    evolver.evolve(context)
>  File
> "/home/menesis/src/schooltool/2.1/src/schooltool/src/schooltool/generations/evolve37.py",
> line 67, in evolve
>    del app[LEVELS_APP_KEY]
>  File
> "/home/menesis/.buildout/eggs/zope.container-3.12.0-py2.7-linux-i686.egg/zope/container/sample.py",
> line 88, in __delitem__
>    uncontained(self.__data[key], self, key)
>  File "/home/menesis/src/schooltool/2.1/python/lib/python2.7/UserDict.py",
> line 23, in __getitem__
>    raise KeyError(key)
> KeyError: 'schooltool.level.level'
> Traceback (most recent call last):
>   ...
> zope.app.generations.interfaces.UnableToEvolve: (37, u'schooltool', 38)
>
> That I am fixing now.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1007361
>
> Title:
>  UnableToEvolve database from schooltool 1.2
>
> Status in SchoolTool:
>  In Progress
>
> Bug description:
>  When upgrading from version 1.2 into 2.0.3 schooltool fails to start,
> reporting UnableToEvolve error.
>  Trace is below.
>
>  To replicate just start 2.0.3 with a 1.2 database file, or use the one
>  attached.
>
>  Traceback (most recent call last):
>    File "/usr/bin/paster", line 8, in <module>
>      load_entry_point('PasteScript==1.7.5', 'console_scripts', 'paster')()
>    File "/usr/lib/python2.6/site-packages/paste/script/command.py", line
> 104, in run
>      invoke(command, command_name, options, args[1:])
>    File "/usr/lib/python2.6/site-packages/paste/script/command.py", line
> 143, in invoke
>      exit_code = runner.run(args)
>    File "/usr/lib/python2.6/site-packages/paste/script/command.py", line
> 238, in run
>      result = self.command()
>    File "/usr/lib/python2.6/site-packages/paste/script/serve.py", line
> 284, in command
>      relative_to=base, global_conf=vars)
>    File "/usr/lib/python2.6/site-packages/paste/script/serve.py", line
> 321, in loadapp
>      **kw)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 247, in loadapp
>      return loadobj(APP, uri, name=name, **kw)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 272, in loadobj
>      return context.create()
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 713, in create
>      return self.object_type.invoke(self)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 144, in invoke
>      **context.local_conf)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/util.py", line 56,
> in fix_call
>      val = callable(*args, **kw)
>    File "/usr/lib/python2.6/site-packages/paste/urlmap.py", line 25, in
> urlmap_factory
>      app = loader.get_app(app_name, global_conf=global_conf)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 350, in get_app
>      name=name, global_conf=global_conf).create()
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 713, in create
>      return self.object_type.invoke(self)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/loadwsgi.py", line
> 146, in invoke
>      return fix_call(context.object, context.global_conf,
> **context.local_conf)
>    File "/usr/lib/python2.6/site-packages/paste/deploy/util.py", line 56,
> in fix_call
>      val = callable(*args, **kw)
>    File "/usr/lib/python2.6/site-packages/schooltool/paste/main.py", line
> 48, in schooltool_app_factory
>      os.path.join(global_conf['here'], config_file))
>    File "/usr/lib/python2.6/site-packages/schooltool/paste/main.py", line
> 37, in __init__
>      db = self.setup(options)
>    File "/usr/lib/python2.6/site-packages/schooltool/app/main.py", line
> 679, in setup
>      notify(DatabaseOpened(db))
>    File "/usr/lib/python2.6/site-packages/zope/event/__init__.py", line
> 31, in notify
>      subscriber(event)
>    File "/usr/lib/python2.6/site-packages/zope/component/event.py", line
> 24, in dispatch
>      zope.component.subscribers(event, None)
>    File "/usr/lib/python2.6/site-packages/zope/component/_api.py", line
> 136, in subscribers
>      return sitemanager.subscribers(objects, interface)
>    File "/usr/lib/python2.6/site-packages/zope/component/registry.py",
> line 321, in subscribers
>      return self.adapters.subscribers(objects, provided)
>    File "/usr/lib/python2.6/site-packages/zope/interface/adapter.py", line
> 585, in subscribers
>      subscription(*objects)
>    File "/usr/lib/python2.6/site-packages/zope/app/appsetup/bootstrap.py",
> line 175, in bootStrapSubscriber
>      zope.event.notify(zope.processlifetime.DatabaseOpenedWithRoot(db))
>    File "/usr/lib/python2.6/site-packages/zope/event/__init__.py", line
> 31, in notify
>      subscriber(event)
>    File "/usr/lib/python2.6/site-packages/zope/component/event.py", line
> 24, in dispatch
>      zope.component.subscribers(event, None)
>    File "/usr/lib/python2.6/site-packages/zope/component/_api.py", line
> 136, in subscribers
>      return sitemanager.subscribers(objects, interface)
>    File "/usr/lib/python2.6/site-packages/zope/component/registry.py",
> line 321, in subscribers
>      return self.adapters.subscribers(objects, provided)
>    File "/usr/lib/python2.6/site-packages/zope/interface/adapter.py", line
> 585, in subscribers
>      subscription(*objects)
>    File
> "/usr/lib/python2.6/site-packages/zope/app/generations/generations.py",
> line 521, in evolveMinimumSubscriber
>      evolve(event.database, EVOLVEMINIMUM)
>    File
> "/usr/lib/python2.6/site-packages/zope/app/generations/generations.py",
> line 506, in evolve
>      manager.generation)
>  zope.app.generations.interfaces.UnableToEvolve: (36, u'schooltool', 38)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/schooltool/+bug/1007361/+subscriptions
>



-- 
___________________________________
Helder Sousa
Product Engineering

Critical Links SA
Parque Industrial de Taveiro, Lote 48
3045-504 Coimbra
Portugal
www.critical-links.com
Office:  +351 239 985 254
Fax: +351 239 985 255