A couple of things to check:

- If you run with -v9 you will get a long and detailed log of the run.
The individual file that is causing the problem should be listed.  Test
that file by unzipping and decoding.  If it fails, you can delete the
incrementals containing it and all subsequent incrementals.  You will
need to do this in a separate directory so you don't modify the original
file.

- Check your system logs for "Bad File Descriptor" or other IO errors.
A bad file descriptor means that you've run out of descriptors and need
to set the limit much higher.  This can happen with a long string of
incrementals.

- Please post the command line you use.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to duplicity in Ubuntu.
https://bugs.launchpad.net/bugs/875676

Title:
  Backing up fails with 'IOError CRC check failed'.

Status in Duplicity:
  In Progress
Status in duplicity package in Ubuntu:
  Confirmed

Bug description:
  For 4 days déjà dup hasn't been able to perform a backup. It fails
  with the error

  Failed to read /tmp/duplicity-lJcUDl-tempdir/mktemp-o4LYSJ-1: (<type
  'exceptions.IOError'>, IOError('CRC check failed 0x8434f7d2L !=
  0x3d503338L',), <traceback object at 0x9fe0554>)

  There is another similar bug #676767 where deleting ~/.cache/deja-dup
  helps. In this case it doesn't.

  I'm quite certain that my backup drive isn't corrupted. (It's a
  raid5.) I'd be happy to provide any additional information needed.

  ----------

  System information:
  Ubuntu 11.10
  deja-dup 20.0-0ubuntu3
  duplicity 0.6.15-0ubuntu2

  Logs:
  deja-dup.log: http://pastie.org/2705320
  deja-dup.gsettings: http://pastie.org/2705322

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