[CalendarServer-users] Please help: AssertionError running CalendarServer

[Gede Pramana]

Dear All,
I¹m having this error while trying to run the CalendarServer on Snow
Leopard:

Starting server...
exec python /Users/gede/Documents/Projects/Twisted/bin/twistd  caldav -f
/Users/gede/Documents/Projects/CalendarServer/conf/caldavd-dev.plist -o
ProcessType=Combined
Traceback (most recent call last):
  File "/Users/gede/Documents/Projects/Twisted/bin/twistd", line 19, in
<module>
    run()
  File "/Users/gede/Documents/Projects/Twisted/twisted/scripts/twistd.py",
line 27, in run
    app.run(runApp, ServerOptions)
  File "/Users/gede/Documents/Projects/Twisted/twisted/application/app.py",
line 689, in run
    config.parseOptions()
  File "/Users/gede/Documents/Projects/Twisted/twisted/application/app.py",
line 669, in parseOptions
    usage.Options.parseOptions(self, options)
  File "/Users/gede/Documents/Projects/Twisted/twisted/python/usage.py",
line 226, in parseOptions
    for (cmd, short, parser, doc) in self.subCommands:
  File "/Users/gede/Documents/Projects/Twisted/twisted/application/app.py",
line 680, in subCommands
    self.loadedPlugins[plug.tapname] = plug
  File 
"/Users/gede/Documents/Projects/CalendarServer/twisted/plugins/caldav.py",
line 13, in getProperty
    return getattr(reflect.namedClass(self.serviceMakerClass), propname)
  File "/Users/gede/Documents/Projects/Twisted/twisted/python/reflect.py",
line 349, in namedObject
    module = namedModule('.'.join(classSplit[:-1]))
  File "/Users/gede/Documents/Projects/Twisted/twisted/python/reflect.py",
line 337, in namedModule
    topLevel = __import__(name)
  File 
"/Users/gede/Documents/Projects/CalendarServer/calendarserver/sidecar/task.p
y", line 24, in <module>
    from calendarserver.provision.root import RootResource
  File 
"/Users/gede/Documents/Projects/CalendarServer/calendarserver/provision/root
.py", line 31, in <module>
    from twistedcaldav.extensions import DAVFile, CachingPropertyStore
  File 
"/Users/gede/Documents/Projects/CalendarServer/twistedcaldav/extensions.py",
line 65, in <module>
    from twistedcaldav.method.report import http_REPORT
  File 
"/Users/gede/Documents/Projects/CalendarServer/twistedcaldav/method/report.p
y", line 31, in <module>
    from twext.web2.dav.davxml import ErrorResponse
  File 
"/Users/gede/Documents/Projects/CalendarServer/twext/web2/dav/__init__.py",
line 28, in <module>
    twisted.web2.dav.davxml.registerElements(davxml)
  File 
"/Users/gede/Documents/Projects/Twisted/twisted/web2/dav/element/parser.py",
line 65, in registerElements
    registerElement(element_class, element_names)
  File 
"/Users/gede/Documents/Projects/Twisted/twisted/web2/dav/element/parser.py",
line 78, in registerElement
    % (qname, elements_by_tag_name[qname], element_class)
AssertionError: Attempting to register qname ('DAV:', 'error') multiple
times: (<class 'twisted.web2.dav.element.rfc3253.Error'>, <class
'twisted.web2.dav.element.rfc3253.Error'>)
launchctl bsexec failed: No such file or directory

I¹m sorry, I¹m a newbie. Is anyone having the same problem?

Thank you in advance.
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