When I select images from Hob and try to open images, the backend shows:

an@HP:/opt/123/build3$ hob
Traceback (most recent call last):
  File "/home/an/workspace/poky-contrib/bitbake/lib/bb/ui/crumbs/hig.py", line 1255, in select_path_cb
    self.fill_image_store()
  File "/home/an/workspace/poky-contrib/bitbake/lib/bb/ui/crumbs/hig.py", line 1268, in fill_image_store
    for real_image_type in hcc.SUPPORTED_IMAGE_TYPES[image_type]:
KeyError: 'elf'
^CTraceback (most recent call last):
  File "/home/an/workspace/poky-contrib/bitbake/lib/bb/ui/hob.py", line 55, in event_handle_idle_func
    event = eventHandler.getEvent()
  File "/home/an/workspace/poky-contrib/bitbake/lib/bb/server/process.py", line 233, in getEvent
    return self.get(False)
  File "/usr/lib/python2.7/multiprocessing/queues.py", line 129, in get
    if not self._poll(block and (deadline-time.time()) or 0.0):
KeyboardInterrupt

which was brought in by the commit http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=c9b01af84b64edba056f959c349895e0698324e6