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Error: Backup Set Format Inconsistency

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A few days ago my backup produced an error:


Grooming Backup Set Backup Set A failed, error -1017 ( insufficient permissions)

You must recreate the Backup Set's Catalog File.


I have not reviewed my entire history, but I don't think that error has occurred before.

When I tried to recreate the catalog file I got another error:


Can't load Snapshot tree, error -641 ( chunk checksum didn't match)


Rather than fuss with these problems I decided to start over from scratch by doing a recycle backup.

So far that has produced 56 errors along the lines of


Backup Set format inconsistency (6 at 492295313)


(each error is the same except for the 9-digit address).


After those errors, the log reports:


To Backup Set Backup Set A...

11/2/2011 10:02:13 AM: Recycle backup: The Backup Set was reset


- 11/2/2011 10:02:13 AM: Copying Local Disk (C:)



It is now copying files from C:


Are the format inconsistency errors a problem, or were the problems erased when the backup set was reset? If they are a problem, what should I do?


I am using

Retrospect Professional 7.7.562

Windows 7 Professional Version 6.1.7601 Service Pack 1 Build 7601

The backup set is an external hard drive connected through a USB 2.0 port.

I have one client running Windows XP, but the errors are not occurring during the client backup.

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