Thanks for the reply! I eventually stopped the backup it thought it was still doing, rebooted the computer, and restarted Duplicati. Initially it went right back to the “Waiting for upload to finish” message, and I left it to sit overnight.
This morning I find that it completed a small incremental backup about 30 minutes later. Now it sees two backups in the mega.nz folder. I guess that’s a good result.
The log page for that backup shows only one entry, the second, incremental backup. (I don’t know whether that’s normal, but it seems to me there should be one for the first too.) It completed with two warnings:
- [Warning-Duplicati.Library.Modules.Builtin.CheckMonoSSL-MissingCerts]: No certificates found…
- [Warning-Duplicati.Library.Main.Operation.Backup.FileBlockProcessor.FileEntry-PathProcessingFailed]: Failed to process path:…
Those don’t sound fatal. Sometime I might try restoring a couple of inessential files to see whether the backup is worth anything. In the meantime, I’m trying the same backup with Amazon S3. If that works better, I’ll consider ditching mega.nz.
Thanks again. I’ll leave this open for a bit to see if anyone has further insight to contribute.