Greetings all, I'm running a truly ancient version of Darwin CalendarServer (I honestly don't even know what version, but it's from ~January 2008) on an equally ancient iMac G5 running Mac OS X 10.5.8. This setup has been working perfectly for all of my clients since then, with the current crop being iCal on Mac OS X 10.6, 10.7, and 10.8 machines as well as my iPhone 4S which was running iOS 6 and is now running iOS 7. The only client that is not cooperating is an iPhone 5 running iOS 6.1.3. When it adds the CalDAV account and tries to load the calendars, I get a whole bunch of log messages in access.log and error.log that look like this: ============= 66.245.68.154 - ical [02/Oct/2013:21:29:59 -0500] "PROPFIND /calendars/users/ical/5A131DBC-7199-4BF7-906F-010C1DE00ADC/ HTTP/1.1" 207 518 "-" "iOS/6.1.3 (10B329) dataaccessd/1.0" [83.1 ms] 2013-10-02 21:29:59-0500 [-] [caldav-8008] [HTTPChannel,17,66.245.68.154] REPORT /calendars/users/ical/5A131DBC-7199-4BF7-906F-010C1DE00ADC/ HTTP/1.1 2013-10-02 21:29:59-0500 [-] [caldav-8008] [-] Exception rendering: 2013-10-02 21:29:59-0500 [-] [caldav-8008] [-] Unhandled Error 2013-10-02 21:29:59-0500 [-] [caldav-8008] Traceback (most recent call last): 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 239, in callback 2013-10-02 21:29:59-0500 [-] [caldav-8008] self._startRunCallbacks(result) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 304, in _startRunCallbacks 2013-10-02 21:29:59-0500 [-] [caldav-8008] self._runCallbacks() 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 317, in _runCallbacks 2013-10-02 21:29:59-0500 [-] [caldav-8008] self.result = callback(self.result, *args, **kw) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 601, in gotResult 2013-10-02 21:29:59-0500 [-] [caldav-8008] _deferGenerator(g, deferred) 2013-10-02 21:29:59-0500 [-] [caldav-8008] --- <exception caught here> --- 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 576, in _deferGenerator 2013-10-02 21:29:59-0500 [-] [caldav-8008] result = g.next() 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/CalendarServer/twistedcaldav/method/report.py", line 62, in http_REPORT 2013-10-02 21:29:59-0500 [-] [caldav-8008] doc = doc.getResult() 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 555, in getResult 2013-10-02 21:29:59-0500 [-] [caldav-8008] self.result.raiseException() 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/internet/defer.py", line 317, in _runCallbacks 2013-10-02 21:29:59-0500 [-] [caldav-8008] self.result = callback(self.result, *args, **kw) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/web2/dav/util.py", line 66, in gotAllData 2013-10-02 21:29:59-0500 [-] [caldav-8008] return filter(result) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/web2/dav/util.py", line 79, in parse 2013-10-02 21:29:59-0500 [-] [caldav-8008] doc = davxml.WebDAVDocument.fromString(xml) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/web2/dav/element/parser.py", line 223, in parse 2013-10-02 21:29:59-0500 [-] [caldav-8008] parser.parse(source) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/xml/sax/expatreader.py", line 107, in parse 2013-10-02 21:29:59-0500 [-] [caldav-8008] xmlreader.IncrementalParser.parse(self, source) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/xml/sax/xmlreader.py", line 123, in parse 2013-10-02 21:29:59-0500 [-] [caldav-8008] self.feed(buffer) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/xml/sax/expatreader.py", line 207, in feed 2013-10-02 21:29:59-0500 [-] [caldav-8008] self._parser.Parse(data, isFinal) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/xml/sax/expatreader.py", line 349, in end_element_ns 2013-10-02 21:29:59-0500 [-] [caldav-8008] self._cont_handler.endElementNS(pair, None) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/Twisted/twisted/web2/dav/element/parser.py", line 178, in endElementNS 2013-10-02 21:29:59-0500 [-] [caldav-8008] element = top["class"](*top["children"], **top["attributes"]) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/CalendarServer/twistedcaldav/caldavxml.py", line 1187, in __init__ 2013-10-02 21:29:59-0500 [-] [caldav-8008] super(TimeRange, self).__init__(*children, **attributes) 2013-10-02 21:29:59-0500 [-] [caldav-8008] File "/Library/CalendarServer/twistedcaldav/caldavxml.py", line 85, in __init__ 2013-10-02 21:29:59-0500 [-] [caldav-8008] self.end = parse_date_or_datetime(attributes["end" ]) 2013-10-02 21:29:59-0500 [-] [caldav-8008] exceptions.KeyError: 'end' 2013-10-02 21:29:59-0500 [-] [caldav-8008] =============== I have no idea what is different about this client compared to all of the others. Does anyone want to offer any troubleshooting advice other than to upgrade? :):) Thanks in advance!! -- Julian Y. Koh Acting Associate Director, Telecommunications and Network Services Northwestern University Information Technology (NUIT) 2001 Sheridan Road #G-166 Evanston, IL 60208 847-467-5780 NUIT Web Site: <http://www.it.northwestern.edu/> PGP Public Key:<http://bt.ittns.northwestern.edu/julian/pgppubkey.html>