Unable to read orientation value

[Nadia Alramli]

I'm getting this error when running any action on a specific photo:

Error 0: Unable to open file: /home/nadia/Desktop/exper/example/00200.jpg:
Unknown orientation value (0)

Traceback (most recent call last):
  File "/home/nadia/projects/phatch/phatch/core/api.py", line 245, in get_photo
    photo = pil.Photo(image_file,image_index,save_metadata,folder)
  File "/home/nadia/projects/phatch/phatch/core/pil.py", line 358, in __init__
    self.rotate_exif()
  File "/home/nadia/projects/phatch/phatch/core/pil.py", line 511, in rotate_exif
    raise Exception(_('Unknown orientation value (%s)')%orientation)
Exception: Unknown orientation value (0)
*

I'm attaching an action list and two almost identical photos. Only one of them produces the error. Both photos were taken with a Nikon D60 Camera.
One more thing. After the error the execution is aborted even if I select 'Skip to Next image' and there are hundreds of other images to process.

[Nadia Alramli (nadiana)]

If you run the actionlist on the sample photos provided you'll get this warning too:
Warning 0:
Failed to save metadata to /home/nadia/Desktop/exper/example_phatch/00199.jpg:
pyexiv2: sequence item 0: expected string, exceptions.TypeError found
Trying again by ignoring tags with following pattern:
Exif[.]Canon

I think they are related.

[Stani (stani)]

Thanks again for the excellent bug report.