Editing zip clears extended properties

If I edit a zip file the Extended properties (tags, rating comment...) are being cleared when the zip is saved. I was not able to produce this in explorer. But it does occur when using 7zip.

Is this expected behavior?
Is there anything we can do to preserve the data?

Do you mean in Opus or only in other programs?

It's common for zip files to be re-created when modified (mainly for safety, so if something goes wrong the original is not lost). If the extra metadata is not explicitly copied to the new version, or if it is not moved using the ReplaceFile API (which does that automatically) then it'll be lost.

Not much you can do if other programs are doing this, aside from store the metadata separate from the file. If Opus is doing it, let us know and the details of archive type(s) and exact operations and we'll see if we can reproduce it and stop it happening, as Opus should preserve its own metadata.

I meant Opus clears the metadata. I did some more testing and things are not what I thought. My previous testing with Explorer, 7zip and Dopus was not consistent.

However Opus does clear the metadata in some circumstances.
To reproduce

  • Created a zip using dopus.
  • Create new folder,
  • Add a couple of text files.
  • Right click of folder, Directory opus archives, Add to zip.
  • Add rating, tag or comment to the new zip file.
  • Remove a file from the zip file

data is now cleared

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Did you need more info?

This will be improved in the next update.

Thanks @jon. Appreciated.

I tested V12.6.1, is fixed thanks

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