Christopher Petrilli wrote:

Are you getting KeyErrors or are you getting log messages complaining about keyts not existing?

KeyErrors - the logging says: 2000-12-20T16:33:00 ERROR(200) UnKeywordIndex unindex_object could not remove 3 from set -- Email: itamar(at)shtull-trauring.org Web: http://itamarst.org

Here's what was causing my KeyErrors, and how I solved it, and why I think KeywordIndexes broke. I have a keyword index on the "categories" property of my CatalogAware object. "categories" is a list. def manage_removeItems(self, ids=[]): """ Remove listed items from this category """ for id in ids: ob = getattr(self.Items, id) categories = ob.categories # <-- this is the problem categories.remove(self.uid) ob.manage_changeProperties(categories=categories) ob.reindex_object() I solved the problem by switching the problem line to say "categories = ob.categories[:]". What does this mean? I was mutating the same list that was attached to the object. Doing this caused the Keyword Index to break. I assume the reason then is that the index somewhere stored a reference to the "categories" property, not a copy. This means that when I mutated ob.categories, I was also mutating the contents of the index, causing it to get screwed up. The solution would be that keyword indexes store a *copy* of the property they are indexing, not a reference to it. If I'm not mistaken, that means changing line 42 in UnKeywordIndex.py (2.2.4 version) from: unindex[i] = kws to: unindex[i] = kws[:] Although use of deepcopy may be a better idea? -- Email: itamar(at)shtull-trauring.org Web: http://itamarst.org