Error running backup even though backup files are still present

[dwatrous]

Hi,

I have a backup that has been running for about a month. Today when I checked on it I saw a red error message with buttons to Repair, Show and Dismiss. As of May 5 in the morning the backup completed with some warnings, but 12 hours later it complained that 23090 files are missing. There are exactly 23090 files on in the backup folder on my external hard drive. When I click repair I get this error

2025-05-07 07:47:00 -05 - [Error-Duplicati.Library.Main.Controller-FailedOperation]: The operation Repair has failed with error: The backup storage destination is missing data files. You can either enable --rebuild-missing-dblock-files or run the purge command to remove these files. The following files are missing: duplicati-b55c46c6a0c914fb2ad22fd9a54504008.dblock.zip.aes,…and so on for all the file names

Backup operations show this error

• 2025-05-07 07:46:46 -05 - [Error-Duplicati.Library.Main.Controller-FailedOperation]: The operation Backup has failed with error: Found 23090 files that are missing from the remote storage, please run repair RemoteListVerificationException: Found 23090 files that are missing from the remote storage, please run repair

I’m running “Duplicati - 2.1.0.5_stable_2025-03-04”

Any idea what happened or how to fix this?

[ts678]

Welcome to the forum @dwatrous

@dwatrous

Any idea what happened or how to fix this?

Are you sure the external hard drive is still mounted, and at the configured drive letter?

Can you browse to it in the Duplicati GUI to see its 23090 files? If not, there’s the issue.

You can click on list you see in Job → Show log → Remote. What files did that see?

Removable drives (mostly Windows) describes a way to account for drive letter change.

Is Duplicati running as you, some other user, or SYSTEM (e.g. for a Windows service)?

[dwatrous]

The hard drive is mounted and has the same drive letter.

I’m not sure what you mean by browse to it in the duplicati gui. Is that the web UI? I’m not sure how I would browse to it in the gui.

Here’s what I see in list is this

It’s running in my user account, but there are other users on the system.

My backup folder is call “G:\Full Backup” with the space. The backup worked fine, but when I try to run command line commands through the web interface, it only shows "file://G:", not the full path to the folder.

What’s next?

[ts678]

@dwatrous

I’m not sure how I would browse to it in the gui.

For example, Edit → Destination → Browse, but Source screen also has a file browser.

@dwatrous

Here’s what I see in list is this

That looks like a drive root, but that’s consistent with

@dwatrous

command line commands through the web interface, it only shows “file://G:”

Is that just a test? This is the first mention of command line. What was original post?

Regardless, you can check your Destination. There’s also a three-dot menu offering:

Copy Destination URL to Clipboard. An example of format it makes is

file://C:\Duplicati\duplicati-2.1.0.117_canary_2025-04-25-win-x64-gui\RUN\test 1\

[dwatrous]

I see. When I go to Edit → Destination → Browse, I do see the drive.

Some of the troubleshooting steps indicated to run command line arguments. I was trying to do this through the web interface. That’s where I saw “file://G:”.

I think I know what happened. At one point I changed the settings under Edit. I noticed then, but realized just now that the GUI doesn’t remember and automatically expand and select a subfolder. I must have accidentally changed it to be root of G:. I just edited and expanded and chose the subfolder where the backup files are and the backup is running successfully.

Thanks for your help @ts678