Read-only button on archives always disabled

Directory Opus 13.6 Build 8890 x64
OS 10.0 (B:22631 P:2 T:1) SP 0.0

Today I wanted to add the "Read-Only" toggle button to a toolbar, since this is the first time I required writing to a ZIP file from within Opus since upgrading to v13. However, the button is always disabled for me, and thus I cannot make an archive "read-write" without going into the settings and changing the setting there.
I actually now tried running set READONLY=Toggle or set READONLY=Offand that also did not work, is there another setting I'm missing?

Set READONLY=toggle applies to the File Display. If you want to change the file attributes, you need to use

@nodeselect
SetAttr TOGGLEATTR=r

Thanks, but I think you misunderstand. I have this setting:
prent
Today I want to update an existing zip archive. So I want to use this button to enable writing to the current zip file:
prent
It worked fine in Opus v12, used it like that for years. However in 13 it is always disabled, and the action it triggers
prent
also does not work (maybe why the button is disabled?)
My zip files don't have the read-only attribute set.

It works OK here.

Are you inside an archive when you try to click it? What kind of archive is it? Can we see a screenshot of the whole lister?

Sure, here is one of a font I downloaded a while back:

Anything I can try to get at what is going wrong here?

I now wanted to prepare a small example to check, and I found it was working. Then I had an idea to check whether it may be the parent folder that makes it "not work", and indeed, files in my "Downloads" folder exhibit this behaviour that the "Read-Only" button is not working.
So, it is "working" for me but it was certainly unexpected that "Downloads" prohibit editing zip files. I even copied a file from Downloads to Temp to verify, and it worked :slight_smile:

Maybe (if this is by design) one can add a "Why is this disabled?" to the tooltip of the button.
Something like this:
prent