Using Zope2.6.0 final on FreeBSD; Python 2.1.3 this is at iMeme. Question: I thought I read Tim squashed most (all?) of the known bugs in BTree's in 2.6. Is this true? Has anyone seen this? in a Product i'm using/wrote... we try to get the SESSION.getId() and get a KeyError. Here is the traceback. I would appreciate any feedback. Many thanks. # gc the stale buckets at the "beginning" of _data ("garbage collect") # iterate over the keys in data that have no minimum value and # a maximum value of delete_end (note: ordered set) # XXX- fixme. range search doesn't always work (btrees bug) I believe it is the line after this that is throwing the exception for k in list(data.keys(None, delete_end)): here was the exception: Site Error An error was encountered while publishing this resource. KeyError Sorry, a site error occurred. Traceback (innermost last): * Module ZPublisher.Publish, line 150, in publish_module * Module ZPublisher.Publish, line 114, in publish * Module Zope, line 171, in zpublisher_exception_hook * Module ZPublisher.Publish, line 98, in publish * Module ZPublisher.mapply, line 88, in mapply * Module ZPublisher.Publish, line 39, in call_object * Module Shared.DC.Scripts.Bindings, line 252, in __call__ * Module Shared.DC.Scripts.Bindings, line 283, in _bindAndExec * Module Products.PageTemplates.ZopePageTemplate, line 228, in _exec * Module Products.PageTemplates.PageTemplate, line 95, in pt_render <ZopePageTemplate at /cmf/public_website/index_html> * Module TAL.TALInterpreter, line 186, in __call__ * Module TAL.TALInterpreter, line 230, in interpret * Module TAL.TALInterpreter, line 689, in do_useMacro * Module TAL.TALInterpreter, line 230, in interpret * Module TAL.TALInterpreter, line 459, in do_setLocal_tal * Module Products.PageTemplates.TALES, line 217, in evaluate URL: /cmf/main_template Line 104, Column 4 Expression: standard:'here/portal_commerce/getShoppingCartFor' Names: {'container': <PloneFolder instance at 9372b00>, 'default': <Products.PageTemplates.TALES.Default instance at 0x88bf9ec>, 'here': <PloneFolder instance at 9372b00>, 'loop': <SafeMapping instance at 905c0d0>, 'modules': <Products.PageTemplates.ZRPythonExpr._SecureModuleImporter instance at 0x88b392c>, 'nothing': None, 'options': {'args': ()}, 'repeat': <SafeMapping instance at 905c0d0>, 'request': <HTTPRequest, URL=http://www.dstoys.com/index_html>, 'root': <Application instance at 903d080>, 'template': <ZopePageTemplate at /cmf/public_website/index_html>, 'traverse_subpath': [], 'user': Anonymous User} * Module Products.PageTemplates.Expressions, line 206, in __call__ * Module Products.PageTemplates.Expressions, line 201, in _eval * Module Products.PageTemplates.Expressions, line 108, in render * Module Products.CMFCommerce.CommerceTool, line 260, in getShoppingCartFor * Module Products.CMFCommerce.ShoppingCartManagement, line 113, in getShoppingCartFor * Module ZPublisher.HTTPRequest, line 1189, in __getattr__ * Module ZPublisher.HTTPRequest, line 1149, in get * Module Products.Sessions.SessionDataManager, line 93, in getSessionData * Module Products.Sessions.SessionDataManager, line 180, in _getSessionDataObject * Module Products.Transience.Transience, line 175, in new_or_existing * Module Products.Transience.Transience, line 786, in get * Module Products.Transience.Transience, line 599, in _getCurrentBucket * Module Products.Transience.Transience, line 688, in _housekeep KeyError: 1045356900 (Also, an error occurred while attempting to render the standard error message.)