There is latency between the backup agent with the list of files to be backed up and the time these files are actually backed up. If any of these files are removed between this latency, an informative message, “C:\xxx\yyy\zzz.txt has been removed already”, will be logged in the backup log report. Under most condition, you don’t need to worry about this since files created and then removed in this situation are usually temporary files. It is used by some other applications and it is not necessary to backup these files.

If you are using Infile-Delta, please make sure “Temporary directory for storing backup files” setting of your OBM is pointing a writable directory with plenty of disk space.