Fatal: Duplicati Backup report for Data

Hello,

Since two nights I get a fatal error on my daily backup with Duplicati. I did not change the configuration.

What’s going wrong? Is this a bug and/or is there something I can do about it myself?

For details, see below.

Best regards,
Patrick.

Failed: One or more errors occurred.
Details: System.AggregateException: One or more errors occurred. —> System.AggregateException: Object reference not set to an instance of an object. —> System.NullReferenceException: Object reference not set to an instance of an object.
at Duplicati.Library.Main.Volumes.BlockVolumeWriter.AddBlock(String hash, Byte data, Int32 offset, Int32 size, CompressionHint hint)
at Duplicati.Library.Main.Operation.Backup.SpillCollectorProcess.<>c__DisplayClass0_0.<<Run>b__0>d.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CoCoL.AutomationExtensions.<RunTask>d__101.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Duplicati.Library.Main.Operation.BackupHandler.&lt;RunMainOperation&gt;d__12.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.BackupHandler.&lt;RunAsync&gt;d__19.MoveNext() --- End of inner exception stack trace --- at Duplicati.Library.Main.Operation.BackupHandler.&lt;RunAsync&gt;d__19.MoveNext() --- End of inner exception stack trace --- at CoCoL.ChannelExtensions.WaitForTaskOrThrow(Task task) at Duplicati.Library.Main.Controller.&lt;&gt;c__DisplayClass13_0.&lt;Backup&gt;b__0(BackupResults result) at Duplicati.Library.Main.Controller.RunAction[T](T result, String[]&amp; paths, IFilter&amp; filter, Action1 method)
—> (Inner Exception #0) System.AggregateException: Object reference not set to an instance of an object. —> System.NullReferenceException: Object reference not set to an instance of an object.
at Duplicati.Library.Main.Volumes.BlockVolumeWriter.AddBlock(String hash, Byte data, Int32 offset, Int32 size, CompressionHint hint)
at Duplicati.Library.Main.Operation.Backup.SpillCollectorProcess.<>c__DisplayClass0_0.<<Run>b__0>d.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CoCoL.AutomationExtensions.<RunTask>d__101.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Duplicati.Library.Main.Operation.BackupHandler.&lt;RunMainOperation&gt;d__12.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.BackupHandler.&lt;RunAsync&gt;d__19.MoveNext() --- End of inner exception stack trace --- at Duplicati.Library.Main.Operation.BackupHandler.&lt;RunAsync&gt;d__19.MoveNext() ---&gt; (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object. at Duplicati.Library.Main.Volumes.BlockVolumeWriter.AddBlock(String hash, Byte[] data, Int32 offset, Int32 size, CompressionHint hint) at Duplicati.Library.Main.Operation.Backup.SpillCollectorProcess.&lt;&gt;c__DisplayClass0_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CoCoL.AutomationExtensions.&lt;RunTask&gt;d__101.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Duplicati.Library.Main.Operation.BackupHandler.<RunMainOperation>d__12.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Duplicati.Library.Main.Operation.BackupHandler.<RunAsync>d__19.MoveNext()<—

—> (Inner Exception #1) System.AggregateException: One or more errors occurred. —> System.Net.WebException: The remote server returned an error: 227 Entering Passive Mode (145,133,54,229,202,194)
. —> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 145.133.54.229:51906
at System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
at System.Net.FtpControlStream.ConnectCallback(IAsyncResult asyncResult)
— End of inner exception stack trace —
at Duplicati.Library.Main.Operation.Common.BackendHandler.<DoWithRetry>d__211.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Common.BackendHandler.&lt;&gt;c__DisplayClass13_0.&lt;&lt;UploadFileAsync&gt;b__1&gt;d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Duplicati.Library.Main.Operation.Common.BackendHandler.&lt;UploadFileAsync&gt;d__13.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.BackendUploader.&lt;&gt;c__DisplayClass0_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CoCoL.AutomationExtensions.&lt;RunTask&gt;d__101.MoveNext()
— End of inner exception stack trace —
—> (Inner Exception #0) System.Net.WebException: The remote server returned an error: 227 Entering Passive Mode (145,133,54,229,202,194)
. —> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 145.133.54.229:51906
at System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
at System.Net.FtpControlStream.ConnectCallback(IAsyncResult asyncResult)
— End of inner exception stack trace —
at Duplicati.Library.Main.Operation.Common.BackendHandler.<DoWithRetry>d__211.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Common.BackendHandler.&lt;&gt;c__DisplayClass13_0.&lt;&lt;UploadFileAsync&gt;b__1&gt;d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Duplicati.Library.Main.Operation.Common.BackendHandler.&lt;UploadFileAsync&gt;d__13.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.BackendUploader.&lt;&gt;c__DisplayClass0_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CoCoL.AutomationExtensions.&lt;RunTask&gt;d__101.MoveNext()<—
<—
<—

Log data:
2019-03-27 00:09:09 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.UploadSyntheticFilelist-MissingTemporaryFilelist]: Expected there to be a temporary fileset for synthetic filelist (233, duplicati-b00d62e595fb546adacbb5ad120931a83.dblock.zip.aes), but none was found?
2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto’s\skifotos\ski maart 2019 gezin\2019-03-05 14.08.25.mp4
CoCoL.RetiredException: The channel is retired
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CoCoL.Channel1.&lt;WriteAsync&gt;d__30.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.&lt;&gt;c__DisplayClass2_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() 2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto's\skifotos\ski maart 2019 gezin\2019-03-06 11.59.07.mp4 CoCoL.RetiredException: The channel is retired at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at CoCoL.Channel1.<WriteAsync>d__30.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<>c__DisplayClass2_0.<<Run>b__0>d.MoveNext()
2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto’s\skifotos\ski maart 2019 gezin\2019-03-06 11.59.07.rotated.mp4
CoCoL.RetiredException: The channel is retired
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CoCoL.Channel1.&lt;WriteAsync&gt;d__30.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.&lt;&gt;c__DisplayClass2_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() 2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto's\skifotos\ski maart 2019 gezin\2019-03-07 09.43.53.mp4 CoCoL.RetiredException: The channel is retired at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at CoCoL.Channel1.<WriteAsync>d__30.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<>c__DisplayClass2_0.<<Run>b__0>d.MoveNext()
2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto’s\skifotos\ski maart 2019 gezin\2019-03-07 11.36.16.mp4
CoCoL.RetiredException: The channel is retired
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CoCoL.Channel1.&lt;WriteAsync&gt;d__30.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.&lt;&gt;c__DisplayClass2_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() 2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto's\skifotos\ski maart 2019 gezin\2019-03-07 14.06.25.mp4 CoCoL.RetiredException: The channel is retired at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at CoCoL.Channel1.<WriteAsync>d__30.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<>c__DisplayClass2_0.<<Run>b__0>d.MoveNext()
2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto’s\skifotos\ski maart 2019 gezin\2019-03-08 11.59.00.mp4
CoCoL.RetiredException: The channel is retired
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CoCoL.Channel1.&lt;WriteAsync&gt;d__30.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.&lt;&gt;c__DisplayClass2_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() 2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto's\skifotos\ski maart 2019 gezin\2019-03-08 12.02.05.mp4 CoCoL.RetiredException: The channel is retired at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at CoCoL.Channel1.<WriteAsync>d__30.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.<>c__DisplayClass2_0.<<Run>b__0>d.MoveNext()
2019-03-27 01:46:34 +01 - [Warning-Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.FileEntry-ProcessingMetadataFailed]: Failed to process entry, path: D:\data\prive\Foto’s\skifotos\ski maart 2019 gezin\2019-03-08 12.06.55.mp4
CoCoL.RetiredException: The channel is retired
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CoCoL.Channel1.&lt;WriteAsync&gt;d__30.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Duplicati.Library.Main.Operation.Backup.MetadataPreProcess.&lt;&gt;c__DisplayClass2_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() 2019-03-27 01:46:35 +01 - [Error-Duplicati.Library.Main.Operation.BackupHandler-FatalError]: Fatal error System.NullReferenceException: Object reference not set to an instance of an object. at Duplicati.Library.Main.Volumes.BlockVolumeWriter.AddBlock(String hash, Byte[] data, Int32 offset, Int32 size, CompressionHint hint) at Duplicati.Library.Main.Operation.Backup.SpillCollectorProcess.&lt;&gt;c__DisplayClass0_0.&lt;&lt;Run&gt;b__0&gt;d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CoCoL.AutomationExtensions.&lt;RunTask&gt;d__101.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Duplicati.Library.Main.Operation.BackupHandler.<RunMainOperation>d__12.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Duplicati.Library.Main.Operation.BackupHandler.<RunAsync>d__19.MoveNext()

The above error looks like a problem in the network or destination which looks like an FTP server that tells Duplicati to connect to IP address 145.133.54.229 port 51906 (a.k.a. port 202,194 in direction it gave), and then doesn’t actually manage to receive the connection. Duplicati should try this –number-of-retries times, then give up (which might be what you posted). You can raise that value, or see how well you can do ping:

C:\>ping 145.133.54.229

Pinging 145.133.54.229 with 32 bytes of data:
Reply from 145.133.54.229: bytes=32 time=119ms TTL=49
Reply from 145.133.54.229: bytes=32 time=120ms TTL=49
Reply from 145.133.54.229: bytes=32 time=118ms TTL=49
Reply from 145.133.54.229: bytes=32 time=120ms TTL=49

Ping statistics for 145.133.54.229:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 118ms, Maximum = 120ms, Average = 119ms

C:\>

and you can also watch the live server log with the log level set to Retry to see if uploads are being retried. You could run an Internet speed test to check network health, restart equipment, consult with your ISP, etc.

As a side note, FTP is an old and unreliable protocol, and (unless FTPS) can reveal your login credentials, which might be OK to a local destination, but is a bit risky over the Internet (is this going to a remote site?).

Hi,

Thank you for your response and explanation.

I backup on a daily basis to a NAS at my mother’s place. I checked the connection and the NAS itself and they’re both fine. Today, I planned on diving further into it but since a few days I now get the error “Detected non-empty blocksets with no associated blocks!”. I’m not sure if this is caused by the previous error but the correspondence on the forum regarding this new error does not make me hopeful. I’ll need to dig into this first. A first repair of the database did not help as was also indicated on the forum.

Best regards,

Patrick.