Comparing two documents - "Edit | Track Changes | Compare" does nothing :-(

LibreOffice Writer V7.6.6.3 Windows 10

Thread Compare two documents? refers to the Edit | Track Changes | Compare feature for comparing two documents. However it seems to do nothing! I may be using it wrongly.

I open doc1.odt then do Edit | Track Changes | Compare and highlight doc2.odt. Open.

Instead of displaying a merged document with changes highlighted as being doc1-only or doc2-only, I just see the original doc1 as if I had never tried to compare it with doc2.

https://help.libreoffice.org/7.6/en-GB/text/shared/01/02240000.html?&DbPAR=SHARED&System=WIN

talks about a Track Changes toolbar and a Compare button. Where is that toolbar and button to be found? I can’t see anything either on the toolbar or on the drop-down list of one of the menu-bar options.

I’m sure it’s user error - or rather, incomplete instructions leading to user ignorance!

I’m only looking to do a text comparison, not anything more detailed like comparison of paragraph/character attributes. The ablility to merge selected changes would be a bonus, but not is essential - I’m quite happy to copy/paste from one to another once I’ve found the changes.

Is it relevant that the two documents are password-protected? I am prompted to enter the password for both doc1 and for doc2, so the Compare Document option is getting as far as opening doc2 - but then nothing happens.

At present I have to save the two docs as text, then use WinDiff to compare them.

could be indeed :

So it is related to password-protected documents…

As a test, I did what I should have done before flagging the issue - I saved my password-protected doc to an unprotected copy (doc1), made a trivial change and saved that it to a different unprotected copy (doc2).

Comparing doc1 and doc2 worked as expected.

The only difference from the older bugs that people have raised is that I don’t get an “incorrect password” error message when I give the correct password for the “compare with” document; instead, nothing happens at all.

Glad I’ve learned the solution: it’s no great hardship on the rare occasions that I want to compare password-protected docs, to have to save unprotected temporary copies of the two docs and to compare those instead.

Many thanks.