Hi, I need help to backup MSSQL. In Source, I have selcted my sql and add --snapshot-policy=reqired but when run backup, I get message “No source folders specified for backup.”
If you use Commandline in GUI (no need to actually run anything), is your folder in the box called Commandline arguments? I don’t use MSSQL, but don’t know what “I have selcted my sql” says.
As @ts678 suggested, this means that no sources are added for backup, despite you checking the server. An alternative to the “Commandline” way is to use the text input:
From here we can see if the sql server is indeed being picked up.
Also if you have any additional settings (specifically, disabling modules) this can also impact the results.
Same problem. The databases are selected, but it says “No source folders specified for backup.”
Windows Server 2022, Microsoft SQL Server 2022.
Previously worked on Windows Server 2014 and Microsoft SQL Server 2014.
Feb 8, 2026 1:58 PM: Failed while executing Backup “Duplicati_SQL” (id: 2)
Duplicati.Library.Interface.UserInformationException: No source folders specified for backup
at Duplicati.Library.Main.Controller.ExpandInputSources(String
inputsources, IFilter filter)
at Duplicati.Library.Main.Controller.<>c__DisplayClass22_0.<b__0>d.MoveNext()
— End of stack trace from previous location —
at Duplicati.Library.Utility.Utility.Await(Task task)
at Duplicati.Library.Main.Controller.RunAction[T](T result, String
& paths, IFilter& filter, Func`3 method)
at Duplicati.Library.Main.Controller.Backup(String
inputsources, IFilter filter)
at Duplicati.Server.Runner.RunInternal(Connection databaseConnection, EventPollNotify eventPollNotify, INotificationUpdateService notificationUpdateService, IProgressStateProviderService progressStateProviderService, IApplicationSettings applicationSettings, IRunnerData data, Boolean fromQueue)
Feb 8, 2026 1:58 PM: Error in worker
Duplicati.Library.Interface.UserInformationException: No source folders specified for backup
at Duplicati.Library.Main.Controller.ExpandInputSources(String
inputsources, IFilter filter)
at Duplicati.Library.Main.Controller.<>c__DisplayClass22_0.<b__0>d.MoveNext()
— End of stack trace from previous location —
at Duplicati.Library.Utility.Utility.Await(Task task)
at Duplicati.Library.Main.Controller.RunAction[T](T result, String
& paths, IFilter& filter, Func`3 method)
at Duplicati.Library.Main.Controller.Backup(String
inputsources, IFilter filter)
at Duplicati.Server.Runner.RunInternal(Connection databaseConnection, EventPollNotify eventPollNotify, INotificationUpdateService notificationUpdateService, IProgressStateProviderService progressStateProviderService, IApplicationSettings applicationSettings, IRunnerData data, Boolean fromQueue)
at Duplicati.Server.Runner.Run(Connection databaseConnection, EventPollNotify eventPollNotify, INotificationUpdateService notificationUpdateService, IProgressStateProviderService progressStateProviderService, IApplicationSettings applicationSettings, IQueuedTask data, Boolean fromQueue)
at Duplicati.WebserverCore.Services.QueueRunnerService.RunTask(IQueuedTask task)