plone - Plone 4.3：AttributeError：在更新目录时清除membran_tool

Question

最近我将一个plone 3网站升级为plone 4.3网站。在 myhost/projectname/membrane_tool/manage_catalogAdvanced 我尝试过 clear 和 rebuild 也尝试过更新目录。但它们产生的错误与

Traceback (innermost last):

Module ZPublisher.Publish, line 126, in publish
Module ZPublisher.mapply, line 77, in mapply
Module ZPublisher.Publish, line 46, in call_object
Module Products.CMFPlone.CatalogTool, line 425, in manage_catalogRebuild
Module plone.app.discussion.patches, line 45, in patchedClearFindAndRebuild
Module Products.ZCatalog.ZCatalog, line 287, in manage_catalogClear
Module Products.ZCatalog.Catalog, line 102, in clear

AttributeError: clear 

任何帮助将不胜感激。提前致谢。