This error occurs when the backup file uploaded to the server is corrupted. Corrupted backup files would not be stored on the backup server but will be uploaded to the backup server again in the next backup job.

If more than one backup job of the same backup set is being run on more than one computer at the same time, you might get this error. Please check if you have installed the client software (OBM) with the same backup account on more than one computer.

Also, please check the file C:\Program Files\OBM\home.txt and see if you have more than one “.obm” record (e.g. C:\Documents and Settings\Administrator\.obm) in this file that refers to the same backup account on the server. If you can find such entries, simply remove the redundant lines from this file and restart the computer.

Sometimes, this problem could be caused by network instability. If this only happens occasionally, you can safely ignore this error.