Hi friends, I am trying to write reports to query CalDav server based on time range, but whenever I try to query the CALDAV server it throws an Internal Server Error CalDav Error log show me this 2008-08-08 17:08:36-0500 [-] [caldav-8009] [AMP,client] OPTIONS /principals/users/vyom/ HTTP/1.1 2008-08-08 17:08:36-0500 [-] [caldav-8009] [AMP,client] PROPFIND /principals/users/vyom/ HTTP/1.1 2008-08-08 17:08:36-0500 [-] [caldav-8009] [AMP,client] PROPFIND /principals/users/vyom/ HTTP/1.1 2008-08-08 17:08:36-0500 [-] [caldav-8009] [AMP,client] PROPFIND /calendars/__uids__/12848531-D888-4724-BA78-F6C015624F0A/ HTTP/1.1 2008-08-08 17:08:36-0500 [-] [caldav-8009] [AMP,client] REPORT /calendars/__uids__/12848531-D888-4724-BA78-F6C015624F0A/calendar/ HTTP/1.1 2008-08-08 17:08:36-0500 [-] [caldav-8009] [-] Exception rendering: 2008-08-08 17:08:36-0500 [-] [caldav-8009] [-] Unhandled Error 2008-08-08 17:08:36-0500 [-] [caldav-8009] Traceback (most recent call last): 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 239, in callback 2008-08-08 17:08:36-0500 [-] [caldav-8009] self._startRunCallbacks(result) 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 304, in _startRunCallbacks 2008-08-08 17:08:36-0500 [-] [caldav-8009] self._runCallbacks() 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 317, in _runCallbacks 2008-08-08 17:08:36-0500 [-] [caldav-8009] self.result = callback(self.result, *args, **kw) 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 601, in gotResult 2008-08-08 17:08:36-0500 [-] [caldav-8009] _deferGenerator(g, deferred) 2008-08-08 17:08:36-0500 [-] [caldav-8009] --- <exception caught here> --- 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 576, in _deferGenerator 2008-08-08 17:08:36-0500 [-] [caldav-8009] result = g.next() 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report.py", line 131, in http_REPORT 2008-08-08 17:08:36-0500 [-] [caldav-8009] yield d.getResult() 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 555, in getResult 2008-08-08 17:08:36-0500 [-] [caldav-8009] self.result.raiseException() 2008-08-08 17:08:36-0500 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/python/failure.py", line 303, in raiseException 2008-08-08 17:08:36-0500 [-] [caldav-8009] raise self.type, self.value, self.tb 2008-08-08 17:08:36-0500 [-] [caldav-8009] exceptions.AttributeError: tzid Please give me some pointers what I am doing wrong Thanks in advance arun