Having problems with UrBackup? Please read before posting


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First of all: Sorry your are having problems with UrBackup. We strife to keep UrBackup bug free, but as with every software project this is a difficult endeavour, which is dependant on the community reporting potential problems.

Before you post for help or describe the problem you should check the following:

  • Is there already an ongoing discussion about this problem? Use the forum search functionality.
  • Check the manual and FAQ
  • UrBackup is Open Source. You may be able to fix the problem and post the solution.

When reporting a problem

  • Create a new forum thread. Do not report your problems directly to the developers.
  • Describe your problem in as much detail as possible. Because you are the first to report this problem there may have been some unusual steps/software constellations causing the problem. If possible, describe those steps and/or software.
  • Include details about operating system, file system, UrBackup versions of both the client and the server
  • Attach or send the log files of the client and/or server. Those log files may contain confidential data. Send them to bugreports@urbackup.org referencing your new thread to avoid posting them publicly, but public posting is preferred. When in doubt do this with both the client and server log file.
  • If UrBackup (client or server) crashes on Windows it creates crash dumps. The crash dump location is logged to the log file. Attach the crash dump or send it to bugreports@urbackup.org referencing your new thread (they may contain confidential data). Instructions for GNU/Linux and FreeNAS.

Log files

The server log file is per default located at C:\Program files\UrBackupServer\urbackup.log. Change warn to debug in C:\Program files\UrBackupServer\args.txt to create a debug log file. Debug log files are preferred. The log file on Linux/FreeBSD is located per default at /var/log/urbackup.log. The log level is an argument to the server program (urbackupsrv run -v debug) or can be configured via /etc/default/urbackupsrv or /etc/sysconfig/urbackupsrv.

The client log file is per default located at C:\Program Files\UrBackup\debug.log on Windows. Run C:\Program Files\UrBackup\enable_debug_logging.bat as admin to enable debug logging. On Linux/FreeBSD the client log file is located at /var/log/urbackupclient.log. To enable debug logging run the backend with urbackupclientbackend -v debug or it can be configured via /etc/default/urbackupclient or /etc/sysconfig/urbackupclient.
On macOS the client log file is located at /Library/Logs/urbackup_client_backend.log.

Attach the log files to your new post or send them to bugreports@urbackup.org, because they may contain data which should not be public.


Win Server 2012 R2 backup failing
Could not read MBR. Error message: Error opening Device 0
VSS failing with no VSS errors
Web Login Intermittently Available
Urbackup 1.4.10 windows client problem (NTFS journal related?)
Client connection error
Incremental File backup errors
File backup error 123: Cannot access path to backup
Server 2.0b not copying files
Client disconnected before sending anything - Server 2.0.36 / 2.0.34
Problem with xtrabackup
LVM snapshot issue
Client indexing
Urbackup Server dont find Debian-Client
'Starting Backup Failed'
UrBackup Server 2.1.14 beta/Client 2.1.11 beta
Can't access path to backup VolumeShadowCopy
Getting Error While Backup
Client starting backup failed
Connection Lost
Urbackup server will not start (Fresh Install)
Client crash on Windows 2012 server
UrBackup Client Crashes when trying to backup
File Backups failing for a certain client - "Error writing metadata to file. -1"
Server Stop doing backups
Servers not backing up Async process failure
Backup hung on a file
Error removing xattrs of %FILENAME%
New Server Setup - Need to Understand Server DR in One Place
Permission Problem with restored files
Backup of URBackup Databases (Feature Request?)
Error starting file metadata download thread
Error starting file metadata download thread
Server indexing forever
Server service stopped and cannot be restarted
Backups running every 5 minutes with -1 Bytes
Help - Incremental cleanup issue - recent backups deleted
UrBackup Client 2.2.6 not backing up added files during incremental backups
Urbacking up its internal DB - always 0 byte
Context menu -> Sorry, something went wrong
Error : Backup HAD errors . Deleting partial backup
Error : Backup HAD errors . Deleting partial backup
Backing up EFI System Partition failed
Not doing full backup because of internet connection
Image Backup Stuck on 99%
Base_dir_lost (7)
Image Backup Stuck on 99%
Getting xattr Error while restoring
Server side service randomly stopping ports not listening
Restore failing for all client
Infinite backup after upgrade to 2.0
Client doesn t upodate settings
Async indexing process not found
Remote Silent Install Issues
Windows Service Stops
Server 2.2.6/2.2.7 issue
Backup fails in the last week
After 2.2.8-CBT install, Win-10 client won't run, Says directory C: doesn't exist
Failed Backups: Windows backup component config XML is empty
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