Hi, I am a novice in zope. i have to debug a program where i get the key value error, traversal error. a lil info from the error log. "Module Products.PageTemplates.ZRPythonExpr, line 49, in __call__ - __traceback_info__: here.getStoryNumber(here.catalog.data.getobject(result.data_record_id_, REQUEST=None).getId()) Module PythonExpr, line 1, in <expression> Module Products.ZCatalog.ZCatalog, line 590, in getobject Module OFS.Traversable, line 284, in unrestrictedTraverse - __traceback_info__: (['20071122_9.txt', 'stories', 'text'], '20071122') KeyError: '20071122'" i am unable to understand why this error is occuring . at the expression. <PythonExpr here.getStoryNumber(here.catalog.data.getobject(result.data_record_id_, REQUEST=None).getId())> i would be happy if some one could give me a sense of direction and give a brief idea where the error could have occured and how i should approach. thanks in advance. suhail