installing ZenPack ZenPacks.zenoss.XenMonitor failed

[Fabrizio Quaranta]

Fabrizio Quaranta [http://community.zenoss.org/people/forthy] created the discussion

"installing ZenPack ZenPacks.zenoss.XenMonitor failed"

To view the discussion, visit: http://community.zenoss.org/message/71244#71244

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I installed Zenoss 4.2.3
I need to install  then XenMonitor zenpack but I get the following error:



2013-01-29T09:14:13 INFO zen.ZenPackManager Output from installing ZenPack ZenPacks.zenoss.XenMonitor-1.1.0-py2.7.egg:
2013-01-29 09:14:12,861 INFO zen.ZPLoader: Loading /opt/zenoss/ZenPacks/ZenPacks.zenoss.XenMonitor-1.1.0-py.egg/ZenPacks/zenoss/XenMonitor/objects/objects.xml
2013-01-29 09:14:12,866 WARNING zen.AddToPack: Unable to find context path /zport/dmd/Devices/Server/Virtual Machine Host (line 4 ?) for Xen
2013-01-29 09:14:12,866 WARNING zen.AddToPack: Not committing any changes
2013-01-29 09:14:12,867 ERROR zen.ZenPackCMD: Error installing ZenPack /tmp/tmpRugucZ/ZenPacks.zenoss.XenMonitor-1.1.0-py2.7.egg
Traceback (most recent call last):
  File "/opt/zenoss/Products/ZenUtils/ZenPackCmd.py", line 243, in InstallEggAndZenPack
    fromUI=fromUI)
  File "/opt/zenoss/Products/ZenUtils/ZenPackCmd.py", line 471, in InstallDistAsZenPack
    zenPack, deferFileDeletion, existing = transactional_actions()
  File "/opt/zenoss/lib/python/ZODB/transact.py", line 44, in g
    r = f(*args, **kwargs)
  File "/opt/zenoss/Products/ZenUtils/ZenPackCmd.py", line 430, in transactional_actions
    zenPack.install(dmd)
  File "/opt/zenoss/Products/ZenModel/ZenPack.py", line 240, in install
    loader.load(self, app)
  File "/opt/zenoss/Products/ZenModel/ZenPackLoader.py", line 107, in load
    importer.loadObjectFromXML(xmlfile=f)
  File "/opt/zenoss/Products/ZenRelations/ImportRM.py", line 481, in loadObjectFromXML
    parser.parse(self.infile)
  File "/opt/zenoss/lib/python/_xmlplus/sax/expatreader.py", line 109, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/opt/zenoss/lib/python/_xmlplus/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/opt/zenoss/lib/python/_xmlplus/sax/expatreader.py", line 216, in feed
    self._parser.Parse(data, isFinal)
  File "/opt/zenoss/lib/python/_xmlplus/sax/expatreader.py", line 312, in start_element
    self._cont_handler.startElement(name, AttributesImpl(attrs))
  File "/opt/zenoss/Products/ZenRelations/ImportRM.py", line 161, in startElement
    'attributes:\n%s' % formattedAttrs)
Exception: Unable to create object using the following attributes:
  * id: /zport/dmd/Devices/Server/Virtual Machine Host/Xen
  * module: Products.ZenModel.DeviceClass
  * class: DeviceClass


2013-01-29 09:14:12,884 ERROR zen.ZenPackCmd: zenpack command failed
Traceback (most recent call last):
  File "/opt/zenoss/Products/ZenUtils/zenpack.py", line 486, in <module>
    zp.run()
  File "/opt/zenoss/Products/ZenUtils/zenpack.py", line 164, in run
    fromUI=self.options.fromui)
  File "/opt/zenoss/Products/ZenUtils/ZenPackCmd.py", line 259, in InstallEggAndZenPack
    raise e
Exception: Unable to create object using the following attributes:
  * id: /zport/dmd/Devices/Server/Virtual Machine Host/Xen
  * module: Products.ZenModel.DeviceClass
  * class: DeviceClass


Coluld you help me?
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