我正在尝试将现有网站从Plone 3.3.6升级到Plone 4.3.7，然后再升级到Plone 5.0。
现有网站非常小，并且没有安装附加产品（vanilla Plone，vanilla模板等）。已经安装了CacheFu，但在之前的一些明显错误之后，我在升级之前删除了它。我只是将var / filestorage（Data.fs等）的内容从v3站点复制到v4站点并重新运行buildout。
在Plone 4.3.7中，当运行UPGRADE选项时，我看到很多成功的活动，然后底部出现以下错误：
Upgrade aborted. Error:
Traceback (most recent call last):
File "/usr/local/Plone4_migration/buildout-cache/eggs/Products.CMFPlone-4.3.7-py2.7.egg/Products/CMFPlone/MigrationTool.py", line 259, in upgrade
step['step'].doStep(setup)
File "/usr/local/Plone4_migration/buildout-cache/eggs/Products.GenericSetup-1.7.7-py2.7.egg/Products/GenericSetup/upgrade.py", line 160, in doStep
self.handler(tool)
File "/usr/local/Plone4_migration/buildout-cache/eggs/plone.app.upgrade-1.3.18-py2.7.egg/plone/app/upgrade/v40/betas.py", line 99, in beta3_beta4
value.remove('Large Plone Folder')
AttributeError: 'tuple' object has no attribute 'remove'
如果我跳过Plone 4.x并跳转到Plone 5.0，我甚至无法运行UPGRADE功能，只是在控制台上获得以下错误跟踪：
2015-10-09 01:14:21 ERROR Zope.SiteErrorLog 1444371261.060.792132208718 http://www.example.com/example
Traceback (innermost last):
Module ZPublisher.Publish, line 127, in publish
Module ZPublisher.BaseRequest, line 444, in traverse
Module ZPublisher.BeforeTraverse, line 97, in __call__
Module Products.CMFCore.PortalObject, line 75, in __before_publishing_traverse__
Module zope.event, line 31, in notify
Module zope.component.event, line 24, in dispatch
Module zope.component._api, line 136, in subscribers
Module zope.component.registry, line 321, in subscribers
Module zope.interface.adapter, line 585, in subscribers
Module zope.component.event, line 32, in objectEventNotify
Module zope.component._api, line 136, in subscribers
Module zope.component.registry, line 321, in subscribers
Module zope.interface.adapter, line 585, in subscribers
Module plone.app.theming.plugins.hooks, line 33, in onRequest
Module plone.app.theming.policy, line 90, in isThemeEnabled
AttributeError: 'NoneType' object has no attribute 'enabled'