Here is log data from a recent “found n missing files, please run repair” error.
The error in the log is
2025-08-17 03:30:59 -04 - [Error-Duplicati.Library.Main.Operation.FilelistProcessor-MissingRemoteFiles]: Found 1 files that are missing from the remote storage, please run repair
grep’ing for missing files we find
2025-08-17 03:30:59 -04 - [Warning-Duplicati.Library.Main.Operation.FilelistProcessor-MissingFile]: Missing file: duplicati-ib81ae893639a4bd9952e7a5a8a39256b.dindex.zip.aes
grep’ing for the filename we find
2025-08-17 03:30:56 -04 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-ib81ae893639a4bd9952e7a5a8a39256b.dindex.zip.aes (5.669 KiB)
2025-08-17 03:30:56 -04 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-ib81ae893639a4bd9952e7a5a8a39256b.dindex.zip.aes (5.669 KiB)
2025-08-17 03:30:59 -04 - [Warning-Duplicati.Library.Main.Operation.FilelistProcessor-MissingFile]: Missing file: duplicati-ib81ae893639a4bd9952e7a5a8a39256b.dindex.zip.aes
So it thinks the “Put” completed, but then the file is missing.
These are the complete log entries (as near as I can tell) for the missing file
2025-08-17 03:30:56 -04 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Started: duplicati-ib81ae893639a4bd9952e7a5a8a39256b.dindex.zip.aes (5.669 KiB)
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-RequestStart]: [System.Net.Http] Event: RequestStart
scheme : https
host : pod-000-1081-04.backblaze.com
port : 443
pathAndQuery : /b2api/v1/b2_upload_file/[censored]
versionMajor : 1
versionMinor : 1
versionPolicy : 0
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-RequestHeadersStart]: [System.Net.Http] Event: RequestHeadersStart
connectionId : 211
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-RequestHeadersStop]: [System.Net.Http] Event: RequestHeadersStop
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-RequestContentStart]: [System.Net.Http] Event: RequestContentStart
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-RequestContentStop]: [System.Net.Http] Event: RequestContentStop
contentLength : 5805
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-ResponseHeadersStart]: [System.Net.Http] Event: ResponseHeadersStart
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-ResponseHeadersStop]: [System.Net.Http] Event: ResponseHeadersStop
statusCode : 503
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-ResponseContentStart]: [System.Net.Http] Event: ResponseContentStart
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-ResponseContentStop]: [System.Net.Http] Event: ResponseContentStop
2025-08-17 03:30:56 -04 - [Verbose-Duplicati.Library.Main.NetworkTrafficLogger.Http-RequestStop]: [System.Net.Http] Event: RequestStop
statusCode : 503
2025-08-17 03:30:56 -04 - [Information-Duplicati.Library.Main.BasicResults-BackendEvent]: Backend event: Put - Completed: duplicati-ib81ae893639a4bd9952e7a5a8a39256b.dindex.zip.aes (5.669 KiB)