Issues with larger Backup to Box

Trying to backup around 170 GB to Box, but for some reason it has stopped a number of times during the initial backup phase. It is possible to run the backup again and it will continue after checking everything, however this doesn’t sit well with me.

The error I get:
System.NullReferenceException: Object reference not set to an instance of an object at Duplicati.Library.Main.Operation.BackupHandler.HandleFilesystemEntry (Duplicati.Library.Snapshots.ISnapshotService snapshot, Duplicati.Library.Main.BackendManager backend, System.String path, System.IO.FileAttributes attributes) [0x0000e] in &lt;ae134c5a9abb455eb7f06c134d211773&gt;:0 at Duplicati.Library.Main.Operation.BackupHandler.RunMainOperation (Duplicati.Library.Snapshots.ISnapshotService snapshot, Duplicati.Library.Main.BackendManager backend) [0x0018a] in &lt;ae134c5a9abb455eb7f06c134d211773&gt;:0 at Duplicati.Library.Main.Operation.BackupHandler.Run (System.String[] sources, Duplicati.Library.Utility.IFilter filter) [0x008e0] in &lt;ae134c5a9abb455eb7f06c134d211773&gt;:0 at Duplicati.Library.Main.Controller+&lt;&gt;c__DisplayClass17_0.&lt;Backup&gt;b__0 (Duplicati.Library.Main.BackupResults result) [0x00036] in &lt;ae134c5a9abb455eb7f06c134d211773&gt;:0 at Duplicati.Library.Main.Controller.RunAction[T] (T result, System.String[]&amp; paths, Duplicati.Library.Utility.IFilter&amp; filter, System.Action1[T] method) [0x0014b] in <ae134c5a9abb455eb7f06c134d211773>:0 at Duplicati.Library.Main.Controller.Backup (System.String inputsources, Duplicati.Library.Utility.IFilter filter) [0x00068] in <ae134c5a9abb455eb7f06c134d211773>:0 at Duplicati.Server.Runner.Run (Duplicati.Server.Runner+IRunnerData data, System.Boolean fromQueue) [0x00494] in <670b0e4a9ae144208688fcb192d20146>:0`

I am using the latest linuxserver docker image, so the Duplicati version I am using is: Duplicati -

Hello @jswart and welcome to the forum! “Object reference not set to an instance of an object” error #2349

Failed while executing “Backup” with id: 1 #2290

look similar to yours, so this might be fixed in (but if you’re going to jump into canary release stream, go to something more recent such as because was a big rewrite, and took time to regain stability). Possibly another beta will be out soon, if you can hang on. One has been discussed, but it hasn’t come out yet.

Thanks for the quick reply!

Trying the latest canary now (needed to change the docker image from linuxserver to the duplicati/duplicati one). Have a 1TB backup running now. If anything goes wrong, I will let you know. If not: great job, thanks!

I can confirm that with the issue is no longer there. I haven’t seen any problems with my large (1TB) backup.

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