Replication Manager - Sometimes get a 259 error when replicating Exchange

I am using Replication Manager 5.2.1.0 to replicate Exchange 2003 data and mount it on my Replication Manager host, and then backup to tape using via my Netbackup server.

Most of the time my Replication Manager jobs complete without any issues, but occasionally one of the jobs will fail with a 259 error code (see details below from one of the failed jobs). The error seems to point to one of the Exchange log files, but I have looked through the Windows event logs on the Exchange server, and on the Replication Manager server and cannot find any 259 errors, or any ESE / ESEUTIL related errors.

The guy who ran this system left last year and I inherited it, so I have some knowledge (but limited) of how this works, and limited knowledge of Exchange.

Anyone seen the 259 error before?

Thanks, Colin.

2010 02 12 14:50:47 my-rm-server 102300 INFO:The Exchange Eseutil utility is using the Required Logs option 2010 02 12 14:50:50 my-rm-server 100468 INFO:The Exchange Eseutil utility is running for log prefix E03 in E:\Snapshots\my-exch-server\Daily_Backup\Ddrive\EXCHSRVR\MDBDATA\SSG4
2010 02 12 14:50:55 my-rm-server 100468 INFO:The Exchange Eseutil utility is running for log prefix E03 in E:\Snapshots\my-exch-server\Daily_Backup\Ddrive\EXCHSRVR\MDBDATA\SSG4
2010 02 12 14:51:00 my-rm-server 100463 INFO:Results No damaged log files were found for log prefix E03, in E:\Snapshots\my-exch-server\Daily_Backup\Ddrive\EXCHSRVR\MDBDATA\SSG4
2010 02 12 14:51:00 my-rm-server 026690 ERROR:ESEUTIL terminated with an error: error code 259 while checking "E:\Snapshots\my-exch-server\Daily_Backup\Ddrive\EXCHSRVR\MDBDATA\SSG4\E03.
2010 02 12 14:51:10 my-rm-server 100619 INFO:ESEUTIL did not run successfully on at least one Exchange database or log path. Mount Operation will fail.
2010 02 12 14:51:10 my-rm-server  INFO:Beginning shutdown of my-exch-server for Exchange agent.
2010 02 12 14:51:10 my-rm-server 000149 ERROR:Mount failed. Performing undo of storage operations.
2010 02 12 14:51:11 my-rm-server  INFO:Unmounted file system E:\Snapshots\my-exch-server\Daily_Backup\Edrive\.
2010 02 12 14:51:13 my-rm-server  INFO:Unmounted file system E:\Snapshots\my-exch-server\Daily_Backup\Ddrive\.
2010 02 12 14:51:13 my-rm-server  INFO:Uninstalling volumes and disks.
2010 02 12 14:51:15 my-rm-server  INFO:Uninstalled volumes and disks.
2010 02 12 14:51:15 my-rm-server  INFO:Making snap replica LUN gbedcapprm01-0060-187039 of source LUN 00060 not visible on mount host my-rm-server. Please be patient.
2010 02 12 14:51:20 my-rm-server  INFO:Making snap replica LUN gbedcapprm01-0131-187039 of source LUN 00131 not visible on mount host my-rm-server. Please be patient.
2010 02 12 14:51:56 my-rm-server 000071 ERROR:The mount activity has failed.
2010 02 12 14:51:56 my-rm-server 000071 ERROR:The mount activity has failed.
2010 02 12 14:51:56 my-rm-server 000071 ERROR:The mount activity has failed.
2010 02 12 14:51:56 my-rm-server 102023 ERROR:The mount of replica from application set my-exch-server_Application Set created at 2010 02 12 12:32:32 to host my-rm-server failed.