Backup produces "index is corrupted (0x70025)" error

As of a few weeks ago, the Acronis backup task that had been running every night, to produce one full backup and 6 incremental backups per week, started to fail with the error: index is corrupted (0x70025). See the entire log, which is copied at the end of this description. The backup is a disk backup from C: to an Acronis Secure Zone created on a second internal disk. And my version is Acronis True Image Home 2010 (build 7,046).

I have searched the forum, and while I have found other reports of the 0x70025 error, I did not find anything that helped.

I did a "CHKDSK C: /r", which fixed some minor errors, but the problem persisted. And I don't know of any way to check the ASZ itself. So I ran the AcronisReport tool, and have attached the report to this topic.

Please let me know what I can do to fix this problem.

Thanks,
Dennis
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1 Information 1/30/2011 4:08:41 PM Operation System_C_DMCR-HOME_1_22_20117 started.
2 Information 1/30/2011 4:08:42 PM Priority changed to Low.
3 Information 1/30/2011 4:08:42 PM Analyzing partition '0-0'...
4 Information 1/30/2011 4:08:43 PM Analyzing partition 'C:'...
5 Information 1/30/2011 4:08:43 PM Analyzing partition '0-0'...
6 Information 1/30/2011 4:08:44 PM Analyzing partition 'D:'...
7 Information 1/30/2011 4:08:44 PM Analyzing partition '2-5'...
8 Information 1/30/2011 4:09:03 PM Create Incremental Backup Archive From: Disk 1 To file: "asz:\System_C_DMCR-HOME_1_22_20117" Compression: High
9 Information 1/30/2011 4:09:03 PM Pending operation 143 started: 'Creating partition image'.
10 Information 1/30/2011 4:09:03 PM Locking partition C:...
11 Error 1/30/2011 4:10:18 PM Operation with partition '2-0' was terminated.
Details:
Index is corrupted. (0x70025)
Tag = 0x89D94B01B483E0EC
12 Error 1/30/2011 4:10:18 PM Operation has completed with errors.