Hi, I am using a UID as the filename for new iCalendar files PUT to the server (ex. 2007-04-11T10:07:13-0600_477504818.ics) and I noticed that these files were always renamed on the server (ex. 270IQ6~Y.ICS). But the original filename still retrieved the proper file. However, it is no longer working: 2007-04-11 10:52:00-0600 [-] [caldav-8082] [HTTPChannel,4,127.0.0.1] PUT /calendars/users/keating/calendar/ 2007-04-11T10:52:00-0600_822729681.ics HTTP/1.1 2007-04-11 10:52:00-0600 [-] [caldav-8082] [-] Writing to file / Users/admin/Developer/Collaboration/CalendarServer/data/calendars/ users/keating/calendar/2007-04-11T10:52:00-0600_822729681.ics 2007-04-11 10:52:01-0600 [-] [caldav-8082] [HTTPChannel,7,127.0.0.1] REPORT /calendars/users/keating/calendar/ HTTP/1.1 2007-04-11 10:52:01-0600 [-] [caldav-8082] [-] Exception rendering: 2007-04-11 10:52:01-0600 [-] [caldav-8082] [-] Unhandled Error 2007-04-11 10:52:01-0600 [-] [caldav-8082] Traceback (most recent call last): 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/internet/defer.py", line 239, in callback 2007-04-11 10:52:01-0600 [-] [caldav-8082] self._startRunCallbacks(result) 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/internet/defer.py", line 304, in _startRunCallbacks 2007-04-11 10:52:01-0600 [-] [caldav-8082] self._runCallbacks() 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/internet/defer.py", line 317, in _runCallbacks 2007-04-11 10:52:01-0600 [-] [caldav-8082] self.result = callback(self.result, *args, **kw) 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/internet/defer.py", line 601, in gotResult 2007-04-11 10:52:01-0600 [-] [caldav-8082] _deferGenerator (g, deferred) 2007-04-11 10:52:01-0600 [-] [caldav-8082] --- <exception caught here> --- 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/internet/defer.py", line 576, in _deferGenerator 2007-04-11 10:52:01-0600 [-] [caldav-8082] result = g.next() 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/CalendarServer/twistedcaldav/method/ report.py", line 131, in http_REPORT 2007-04-11 10:52:01-0600 [-] [caldav-8082] yield d.getResult() 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/internet/defer.py", line 555, in getResult 2007-04-11 10:52:01-0600 [-] [caldav-8082] self.result.raiseException() 2007-04-11 10:52:01-0600 [-] [caldav-8082] File "/Users/admin/ Developer/Collaboration/Twisted/twisted/python/failure.py", line 303, in raiseException 2007-04-11 10:52:01-0600 [-] [caldav-8082] raise self.type, self.value, self.tb 2007-04-11 10:52:01-0600 [-] [caldav-8082] exceptions.AssertionError: Calendar 2007-04-11T10%3A52% 3A00-0600_822729681.ics is missing from calendar collection <CalDAVFile (calendar collection): /Users/admin/Developer/ Collaboration/CalendarServer/data/calendars/users/keating/calendar> I poked around in the .db.sqlite file and see that the "NAME" of the "RESOURCE" is the same as the "UID" and there is no linkage to the actual filename ("2KXNZR~T.ICS" in this case). I'm guessing that the "UID" field used to match the actual filename on the server OR I'm doing something wrong naming the file. Should I submit a bug? Thanks, - Tyler