Comment 42 for bug 1294877

This issue seems to marked as "fix released" under Trusty, but I am seeing the issue (or one
 very similar). I have a brand-new SSD drive that I've put into an external USB enclosure
and I am trying to install 14.10 onto it.

When I click on "Erase Disk" (the only apparently available option) after authorizing, I see
this error message:

org.freedesktop.DBus.Python.AttributeError: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/share/usb-creator/usb-creator-helper", line 218, in Format
    parent_dev = _get_parent_object(udisks, device)
  File "/usr/share/usb-creator/usb-creator-helper", line 49, in _get_parent_object
    parent = partition.get_cached_property('Table').get_string()
AttributeError: 'NoneType' object has no attribute 'get_cached_property'