When creating a ZIP archive, Error 18 is received but 7Z worked

Help & Support
1

The error message

An error occurred copying 'verified_contents.json':
Error opening input file, (ZIP Error 18)

Background

Before an update of Vivaldi (browser), I make a zip archive of the %appdata% folder of Vivaldi.

I have been doing this for years using Dopus 12.XX.

I had updated to 13.XX of DOPUS, (13.05) last week. This was the first time I had done an update of Vivaldi since updating DOPUS.

The following methods created the error

  • I used my quickkey command

    • The commented-out command was what I used for years.
      I tried the "Archive =.zip" part to test if that was an issue.
      copy ARCHIVE=.zip HERE CREATEFOLDER = "{date|yyyyMMdd}_{time|HHmm}"
// Copy ZIP HERE CREATEFOLDER = "{date|yyyyMMdd}_{time|HHmm}"
@NODESELECT

  • I used the toolbar menu to create a zip archive.

The following methods worked

  • Creating a 7Z archive from the toolbar menu

Update to beta 13.5.4

  • This also failed in both methods of creating a zip archive but 7Z worked

Note:

  • I can view (in DOPUS) each of the files (veritifed_contents.json) without any issue.

  • The 'verifited_contents.json' file size ranges from 1KB to 23KB

  • On my system there are 43 'verifited_contents.json' files.

  • I copied the Vivaldi appdata folder to another location and the zip failed but the 7Z worked.

  • Vivaldi was not running when creating the archive.

  • As a test, I rename the files to a different name and extension. I got the same Error 18. (verified_contents.json RENAMED TO abc_vc.txt), in the copied folder.

2

It sounds like the issue happens with particular files. Please archive (e.g. 7z) one and share it with us so we can try to reproduce the issue.

3

Attached is one of the files

verified_contents.7z (1.3 KB)

4

I extracted the 7z to my desktop, then zipped it using Opus (via the right-click menu), and that worked OK here.

verified_contents.zip (1.3 KB)

Do you see the problem if you do the same thing on your desktop, with just that one file (or one folder just containing that file)?

5

I tried to zip the file using the toolbar archive as a zip and I got the same error.
I used the right-click menu as a zip and I got the same error message.

I copied the 7z file to another drive and extracted it.
I then tried to zip the file and I got the same error message.

I open the json file, and then saved it without making any changes.
I was then able to zip the file.
I compared the two files and there were no differences.

Note: I disabled my anti-virus when trying and It still gave me same error.

6

I just tried the same file using Windows File Manger zip the file.
It did not work. It gave me this error message:

File not found or no read permission.

The .json file type was associated with UltraEdit editor.
I change the associated to be Windows Notepad.

I received the same error message.

7

I think there must be something on your system that’s interfering with opening the file in some situations.

A process monitor log might reveal it, but whatever it is must be external to Opus if it is also affecting File Explorer.

8

I have been doing more testing.

I have found that the files it can not zip but 7z can have a date of 1979-12-31.

If I change the date to 1980-01-01 or later it will zip.

Screenshot - 2024-04-26 , 11_20_24
Screenshot - 2024-04-26 , 11_20_241254×450 51.6 KB

I just checked and there are other files not just json that have the 1979 date.
I tried a few of them and a zip will fail but 7z will work.

I did a ProcessMonitor of zipping a file that failed but could not see any issues.

Thanks for your help.

P.S.
I extracted into another folder a previous zip file of Vivaldi's %appdata% folder created using DOPUS 12.33. It had some of the same files with the 1979 dates.

DOPUS 13.05.04 nor Windows File Manager will zip the 1979 date files.

I have never tried Windows File Manager to zip as I have always used DOPUS.

Just strange.

9

This is a closed issue for me.

I changed the modified date to 1980-01-01 from 1979-12-31 and was able to zip the folder.

In doing research on creating a zip file and file dates prior to 1980, it appears to be an issue with most zip libraries.

Thanks for looking into this.

10

I was wondering why the file sent to Leo was able to be zipped on Leo's system but not mine.

I think this may be the difference between our systems.

On my system, I had DOPUS set to use DOPUS' own internal ZIP support.

If I disable this and allow the 7z plugin to support Zip, I could zip the file.
I was also able to zip the complete folder (from a prior copy that had the 1979-dated files).

The change was located at
Preferences / Zip & Other Archives / Zip Files
Uncheck 'Enable internal OPUS Zip support'