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Error 791 error during progressive backup

Question asked by Polarpro on Nov 18, 2014
Latest reply on Dec 5, 2014 by Polarpro



We are experiencing error messages on our FileMaker Server 13. For 10 days now we’ve been receiving an error 791 message that shows problems during a progressive backup:


Error during progressive backup of "Dokumente_Main", a newer copy will be used or made. Remote container directory could not be moved from "file:/E:/FMBackupProgressiv/IncrementalBackup_2014-11-17_2345/Databases/MainDev/ Dokumente_Main" to "filewin:/E:/FMBackupProgressiv/InProgress_FMS/Databases/MainDev/". (20402)


The event does not follow a regular pattern; in the past 8 days we experienced it between 1 and 6 times per day.


The event seems to not interfere with scheduled backups.


We already made sure that the virus scan software for these directories is disabled (referring to a similar problem:


Configuration information:

FileMaker Server:

Server: Windows 2008 R2

Service Pack: Service Pack 1

Memory: 16384 MB

Backup Volume Capacity 1024 GB

Backup Volume Free Space 963 GB


We have a whole bunch of incremental backup folders now, see attached screenshot.