paste.script.command.run(['serve', conf_file] + extra_options)
  File "/home/replaceafill/.buildout/eggs/PasteScript-1.7.3-py2.6.egg/paste/script/command.py", line 84, in run
    invoke(command, command_name, options, args[1:])
  File "/home/replaceafill/.buildout/eggs/PasteScript-1.7.3-py2.6.egg/paste/script/command.py", line 123, in invoke
    exit_code = runner.run(args)
  File "/home/replaceafill/.buildout/eggs/PasteScript-1.7.3-py2.6.egg/paste/script/command.py", line 218, in run
    result = self.command()
  File "/home/replaceafill/.buildout/eggs/PasteScript-1.7.3-py2.6.egg/paste/script/serve.py", line 276, in command
    relative_to=base, global_conf=vars)
  File "/home/replaceafill/.buildout/eggs/PasteScript-1.7.3-py2.6.egg/paste/script/serve.py", line 313, in loadapp
    **kw)
  File "/home/replaceafill/.buildout/eggs/PasteDeploy-1.5.0-py2.6.egg/paste/deploy/loadwsgi.py", line 247, in loadapp
    return loadobj(APP, uri, name=name, **kw)
  File "/home/replaceafill/.buildout/eggs/PasteDeploy-1.5.0-py2.6.egg/paste/deploy/loadwsgi.py", line 272, in loadobj
    return context.create()
  File "/home/replaceafill/.buildout/eggs/PasteDeploy-1.5.0-py2.6.egg/paste/deploy/loadwsgi.py", line 710, in create
    return self.object_type.invoke(self)
  File "/home/replaceafill/.buildout/eggs/PasteDeploy-1.5.0-py2.6.egg/paste/deploy/loadwsgi.py", line 146, in invoke
    return fix_call(context.object, context.global_conf, **context.local_conf)
  File "/home/replaceafill/.buildout/eggs/PasteDeploy-1.5.0-py2.6.egg/paste/deploy/util.py", line 56, in fix_call
    val = callable(*args, **kw)
  File "/home/replaceafill/sandboxes/st-flourish/src/schooltool/paste/main.py", line 48, in schooltool_app_factory
    os.path.join(global_conf['here'], config_file))
  File "/home/replaceafill/sandboxes/st-flourish/src/schooltool/paste/main.py", line 37, in __init__
    db = self.setup(options)
  File "/home/replaceafill/sandboxes/st-flourish/src/schooltool/app/main.py", line 707, in setup
    notify(DatabaseOpened(db))
  File "/home/replaceafill/.buildout/eggs/zope.event-3.5.0_1-py2.6.egg/zope/event/__init__.py", line 23, in notify
    subscriber(event)
  File "/home/replaceafill/.buildout/eggs/zope.component-3.10.0-py2.6.egg/zope/component/event.py", line 24, in dispatch
    zope.component.subscribers(event, None)
  File "/home/replaceafill/.buildout/eggs/zope.component-3.10.0-py2.6.egg/zope/component/_api.py", line 136, in subscribers
    return sitemanager.subscribers(objects, interface)
  File "/home/replaceafill/.buildout/eggs/zope.component-3.10.0-py2.6.egg/zope/component/registry.py", line 321, in subscribers
    return self.adapters.subscribers(objects, provided)
  File "/home/replaceafill/.buildout/eggs/zope.interface-3.6.1-py2.6-linux-i686.egg/zope/interface/adapter.py", line 585, in subscribers
    subscription(*objects)
  File "/home/replaceafill/.buildout/eggs/zope.app.appsetup-3.14.0-py2.6.egg/zope/app/appsetup/bootstrap.py", line 175, in bootStrapSubscriber
    zope.event.notify(zope.processlifetime.DatabaseOpenedWithRoot(db))
  File "/home/replaceafill/.buildout/eggs/zope.event-3.5.0_1-py2.6.egg/zope/event/__init__.py", line 23, in notify
    subscriber(event)
  File "/home/replaceafill/.buildout/eggs/zope.component-3.10.0-py2.6.egg/zope/component/event.py", line 24, in dispatch
    zope.component.subscribers(event, None)
  File "/home/replaceafill/.buildout/eggs/zope.component-3.10.0-py2.6.egg/zope/component/_api.py", line 136, in subscribers
    return sitemanager.subscribers(objects, interface)
  File "/home/replaceafill/.buildout/eggs/zope.component-3.10.0-py2.6.egg/zope/component/registry.py", line 321, in subscribers
    return self.adapters.subscribers(objects, provided)
  File "/home/replaceafill/.buildout/eggs/zope.interface-3.6.1-py2.6-linux-i686.egg/zope/interface/adapter.py", line 585, in subscribers
    subscription(*objects)
  File "/home/replaceafill/.buildout/eggs/zope.app.generations-3.6.0-py2.6.egg/zope/app/generations/generations.py", line 521, in evolveMinimumSubscriber
    evolve(event.database, EVOLVEMINIMUM)
  File "/home/replaceafill/.buildout/eggs/zope.app.generations-3.6.0-py2.6.egg/zope/app/generations/generations.py", line 506, in evolve
    manager.generation)
zope.app.generations.interfaces.UnableToEvolve: (5, u'schooltool.gradebook', 5)