Error when 'sync'-ing repositories.

Hello,

Here is what I received when tried to 'sync' my repositories
to the mirror on USB stick (G:):

G:\svnrepos-mirror>svnsync --username imc --password xxxxxx synchronize
http://walker/svn-mirror/104454
svnsync: REPORT request failed on 'http://walker/svn/104454'
svnsync: REPORT of 'http://walker/svn/104454': 200 OK (http://walker)

What do these messages mean?
The original repositiories are phisycally stored on local drive E:,
\svnrepos folder and
are accessed via Apache 2.0.59. svn is 1.4.3.
There were several revisions on the original repository (from 20 to 31
incl.) that were to be 'sync'-ed.
All of them up to 30th one were 'sync'-ed, but 31 didn't and above
messages appeared.
The repository layout is:
104454
   /branches
   /doc
   /tags
   /trunk

The problematic revision #31 is a commit operation to doc folder. An MS
Excel file (~5MB) is committed.
The file E:\svnrepos\104454\db\revs\31 (the revision) is large 1982KB.
(It seems some compression is applied
here to the binary file.)

I'll be happy to hear any idea why this happened.

-- 
Regards,
Ivan Cenov
OKTO-7 Co., Botevgrad, Bulgaria
i_cenov@botevgrad.com, imc@okto7.com
  GSM: +359 888 76 10 80
phone: +359 723 6 61 20, +359 723 6 61 61
  fax: +359 723 6 62 62
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