I recently upgraded SimpleBlog to qg2.5.4 and can no longer view the blog.  I receive a trackback pasted below.  I know the blog exist as the title are still visible via RSS/RSS2.  Any ideas how to recover?  Anyone's help is greatly appreciated.

http://www.fourings.com/blog

http://www.fourings.com/blog/RSS[2]

Traceback (innermost last):

  Module ZPublisher.Publish, line 106, in publish

  Module ZPublisher.BaseRequest, line 275, in traverse

  Module Products.CMFCore.DynamicType, line 141, in __before_publishing_traverse__

  Module Products.CMFDynamicViewFTI.fti, line 238, in queryMethodID

  Module Products.CMFDynamicViewFTI.fti, line 205, in defaultView

  Module Products.CMFPlone.PloneTool, line 856, in browserDefault

  Module Products.CMFPlone.PloneTool, line 689, in getDefaultPage

  Module Products.CMFPlone.utils, line 113, in getDefaultPage

  Module Products.CMFPlone.browser.navigation, line 103, in getDefaultPage

  Module Products.BTreeFolder2.BTreeFolder2, line 334, in has_key

AttributeError: 'NoneType' object has no attribute 'has_key'

With version 2.5.4 we introduced Large Plone Folder as base class for Blog and BlogFolders. Thus you need to migrate all your existing Blog folders.

You need to add External Method in your Plone instance which will point at module SimpleBlog.migration and function migrateBlogs. Run it. Then do the usual migration steps: update schema and catalog for all SimpleBlog content types.

Volodymyr, thanks so much for your assistance.  The blog is now visible after running the external method.  I went back and checked the package but could not find any information mentioning this in the upgrade procedures.  Did I miss something or was it overlooked?