Hi there!

I'm trying to upgrade from 13.10 to 14.04 and it fails similarly to this
report. In my case it look following:

xxx@yyy:~$ cat /var/log/dist-upgrade/main.log
2014-05-30 08:32:28,896 INFO Using config files '['./DistUpgrade.cfg']'
2014-05-30 08:32:28,896 INFO uname information: 'Linux yyy 3.11.0-22-generic 
#38-Ubuntu SMP Thu May 15 20:47:00 UTC 2014 x86_64'
2014-05-30 08:32:28,896 INFO apt version: '0.9.9.1~ubuntu1'
2014-05-30 08:32:28,897 INFO release-upgrader version '0.220.2' started
2014-05-30 08:32:29,032 ERROR not handled exception:
Traceback (most recent call last):

  File "/tmp/ubuntu-release-upgrader-ayzcpe/trusty", line 10, in <module>
    sys.exit(main())

  File "/tmp/ubuntu-release-upgrader-ayzcpe/DistUpgrade/DistUpgradeMain.py", 
line 229, in main
    from .DistUpgradeController import DistUpgradeController

  File 
"/tmp/ubuntu-release-upgrader-ayzcpe/DistUpgrade/DistUpgradeController.py", 
line 65, in <module>
    from .DistUpgradeQuirks import DistUpgradeQuirks

  File "/tmp/ubuntu-release-upgrader-ayzcpe/DistUpgrade/DistUpgradeQuirks.py", 
line 39, in <module>
    from .janitor.plugincore.manager import PluginManager

  File "/tmp/ubuntu-release-upgrader-ayzcpe/DistUpgrade/janitor/__init__.py", 
line 20, in <module>
    import pkg_resources

ValueError: bad marshal data (unknown type code)

-----------------------------------------------------EOF!

What can be wrong here? It looks like python doe not work wall.
How can it be fixed?

Thanks in advance!

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https://bugs.launchpad.net/bugs/1221950

Title:
  Trying to Update to 13.10 and system don't let me

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