The Agent Status window displays 'Completed with Errors' when finished.
While not all errors are harmless, the following is a common cause for the agent to report errors. During security translation, the Agent will attempt to translate security on a mapped drive, floppy drive or CD-Rom Drive and will fail with errors since it is not a local drive.
Since machines may be different where one may have muliple partitions and another does not, the agent will scan all drives to make sure it has found all local drives for security translation. Floppy, mapped and CD-Rom drives will return an error since they are not local.
You should verify error in the agent log by selecting the computer name associated with the 'Completed with Errors' dialog and select 'Agent Detail', then 'View Log'. DMA will access that machine and show you the details of the DCTlog.txt which is the agent's log.