Failed while executing "Backup" with id: 12

I get the folowing error, but can’t find any details of how to solve it.

Failed while executing “Backup” with id: 12

System.IO.IOException: The handle is invalid.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileSystemInfo.get_Attributes()
at Duplicati.Library.Main.Controller.ExpandInputSources(String inputsources, IFilter filter)
at Duplicati.Library.Main.Controller.<>c__DisplayClass13_0.b__0(BackupResults result)
at Duplicati.Library.Main.Controller.RunAction[T](T result, String& paths, IFilter& filter, Action`1 method)
at Duplicati.Library.Main.Controller.Backup(String inputsources, IFilter filter)
at Duplicati.Server.Runner.Run(IRunnerData data, Boolean fromQueue)

Hi @sarangtc, welcome to the forum!

It looks like Duplicati might be having troubles getting your Source folders. Do they maybe include drives (physical or mapped) that might not always be connected? Or perhaps you are including something like a cloud share folder (such as Dropbox or Google Stream) as a source?

If nothing jumps out to you, try posting you Source folders list so we can take a look.