Hi, I have encountered a strange problem with ZCatalogs in Zope 2.3.2. We have objects having DateTime arguments effective_date and expiration_date that gets indexed in different ZCatalogs. (The index is a field index). We then tries to get all published objects that have not yet been archived: now=_.DateTime() Service.searchResults( effective_date =now, effective_date_usage='range:max' , expiration_date =now, expiration_date_usage='range:min' ) Now this works fine, until one day when result searchResults returns an empty result list which is not expected. It seems to be that some days the range:min statement doesn't work correctly. (I tried with different range:* combinations and the only thing I found not working is the range:min statement (some days). If I instead use a different value for now: now2 = _.DateTime(now.Date()) # now.Date() returns somethong like "2002/03/21" which in turn makes the now2 equal to the DateTime value "2002/03/21 00:00:000 GMT+1" (GMT+1 is my local TimeZone) Now using now2 in: Service.searchResults( effective_date =now, effective_date_usage='range:max' , expiration_date =now2, expiration_date_usage='range:min' ) will always result in a list (all though it gets quantized to midnight the resulting list will be somewhat biased). What I don't seem to understand is that DateTime() and DateTime(DateTime().Date) gets so different results. Have anyone seen something like this before? Best Regards, Johan Carlsson -- Johan Carlsson, Torped AB http://www.torped.se -- http://easypublisher.torped.se