We are using version 5.3 with patch 5. Incremental and full backup are configured but every day we receive an alarm notification.
When you mention local repository what are you referring to...the disk on the ACS? If you are pushing these incremental backups to a different repository without moving the first full backup, all incremental backups, the catalog.xml and the repolock.cfg file. The reason is that when an incremental backup is initiated the ACS needs to scan the repolock file to see if there is another process that has locked that file, it also writes to the catalog.xml file too in order to find alist or what backups it needs to restore in case you need to ever restore the data.
With that said, please delete all the files on your new repository, delete the backup configuration and reboot the ACS. Then initiate a full backup and then reconfigure the incremental backups that you did the first time.
*Please rate helpful posts*