Ical server caldavd error

hello people,
i suddenly become this error in the logs of ical server, i dont have any idea what it means please help
best regards
Tony
011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report_common.py", line 133, in responseForHref
2011-02-11 13:48:34+0100 [-] [caldav-8009] d = propertiesForResource(request, propertyreq, resource, calendar, timezone, isowner)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report_common.py", line 199, in propertyListForResource
2011-02-11 13:48:34+0100 [-] [caldav-8009] return _namedPropertiesForResource(request, prop.children, resource, calendar, timezone, isowner)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 832, in unwindGenerator
2011-02-11 13:48:34+0100 [-] [caldav-8009] return _inlineCallbacks(None, f(*args, **kwargs), Deferred())
2011-02-11 13:48:34+0100 [-] [caldav-8009] --- <exception caught here> ---
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 749, in _inlineCallbacks
2011-02-11 13:48:34+0100 [-] [caldav-8009] result = g.send(result)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report_common.py", line 256, in _namedPropertiesForResource
2011-02-11 13:48:34+0100 [-] [caldav-8009] propvalue = property.elementFromCalendarWithAccessRestrictions(calendar, access, timezone)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/caldavxml.py", line 647, in elementFromCalendarWithAccessRestrictions
2011-02-11 13:48:34+0100 [-] [caldav-8009] return CalendarData.fromCalendar(filtered_calendar)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/caldavxml.py", line 403, in fromCalendar
2011-02-11 13:48:34+0100 [-] [caldav-8009] return clazz(davxml.PCDATAElement(str(calendar)))
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/ical.py", line 361, in _str_
2011-02-11 13:48:34+0100 [-] [caldav-8009] def _str_ (self): return self._vobject.serialize()
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/base.py", line 186, in serialize
2011-02-11 13:48:34+0100 [-] [caldav-8009] return behavior.serialize(self, buf, lineLength, validate)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/behavior.py", line 148, in serialize
2011-02-11 13:48:34+0100 [-] [caldav-8009] if validate: cls.validate(obj, raiseException=True)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/behavior.py", line 83, in validate
2011-02-11 13:48:34+0100 [-] [caldav-8009] if not child.validate(raiseException, complainUnrecognized):
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/base.py", line 69, in validate
2011-02-11 13:48:34+0100 [-] [caldav-8009] return self.behavior.validate(self, *args, **kwds)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/icalendar.py", line 989, in validate
2011-02-11 13:48:34+0100 [-] [caldav-8009] raise ValidateError(m)
2011-02-11 13:48:34+0100 [-] [caldav-8009] vobject.base.ValidateError: 'VEVENT components cannot contain both DTEND and DURATION components'
2011-02-11 13:48:34+0100 [-] [caldav-8009]

Another log message:
2007-11-04 12:17:48+0100 [HTTPChannel,0,84.150.186.146] Exception rendering:
2007-11-04 12:17:48+0100 [HTTPChannel,0,84.150.186.146] Unhandled Error
Traceback (most recent call last):
File "/usr/share/caldavd/lib/python/twisted/web2/channel/http.py", line 412, in processRequest
self.request.process()
File "/usr/share/caldavd/lib/python/twisted/web2/server.py", line 291, in process
d.callback(None)
File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 239, in callback
self._startRunCallbacks(result)
File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 304, in _startRunCallbacks
self._runCallbacks()
--- <exception caught here> ---
File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 317, in _runCallbacks
self.result = callback(self.result, *args, **kw)
File "/usr/share/caldavd/lib/python/twisted/web2/server.py", line 288, in <lambda>
d.addCallback(lambda res, req: res.renderHTTP(req), self)
File "/usr/share/wikid/lib/python/apple_wlt/UserServer.py", line 81, in renderHTTP
baseURL = u"%s://%s/%s/" % (theRequest.scheme, theRequest.headers.getRawHeaders('x-forwarded-host')[0], 'users')
exceptions.TypeError: 'NoneType' object is unsubscriptable

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    2009-05-07 12:20:28-0400 [-] [caldav-8008] [OpenDirectoryService] Record disabled due to conflict: <OpenDirectoryRecord[groups@058167af-ace8-519a-ac3d-e166498db024(/Search->/Loca l/Default)] ABCDEFAB-CDEF-ABCD-EFAB-CDEF00000014(staff) 'Users'>
    2009-05-07 12:20:28-0400 [-] [caldav-8008] [OpenDirectoryService] Record disabled due to conflict: <OpenDirectoryRecord[groups@058167af-ace8-519a-ac3d-e166498db024(/Search->/LDAP v3/xserve001.upincstudio.ca)] 61746A78-BFE1-49F0-861A-FB1AA07DFDE5(staff) 'Open Directory Users'>
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    2013-10-10 11:34:05+0200 [-] [caldav-8010]        File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/xml/sax /expatreader.py", line 207, in feed
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    2013-10-10 11:34:05+0200 [-] [caldav-8010]        File "/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/xml/sax /expatreader.py", line 349, in end_element_ns
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    2013-10-10 11:34:05+0200 [-] [caldav-8010]        File "/usr/share/caldavd/lib/python/twisted/web2/dav/element/parser.py", line 178, in endElementNS
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    If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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    BSCF General Channel
    PIN: C0001B7B4   Display/Scan Bar Code
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