Large, old Book w. embedded .pdx from Acrobat 9 Pro works in Acro 9 Pro but slow new Reader Version

[Mike27587928ayhl]

The book has an embedded search index that I believe is of .pdx type.

When I open the .pdf in Acrobat 9 Pro and use "Open Full Acrobat Search" (ctl+shift+F)" and enter a search term, the hit list appears instantly. Even if there are thousands of hits.

If I do the same in newer versions of Acrobat Reader, the Full Search window opens, but it looks like the embedded index is ignored and the search query can take minutes to complete. It's acting like it is compiling a hit list by scanning the entire book. Each search takes about as long as it took to create the index in Acrobat 9 Pro.

Is there any way to remedy this without buying a new version of Acrobat?

[Bernd Alheit]

Have you activated the embedded index?

https://helpx.adobe.com/acrobat/using/creating-pdf-indexes.html

[Mike27587928ayhl]

Sorry. Don't know what you mean by "activate".

I created the embedded index with the menu dialogs from Acrobat 9 Pro:

Advanced/Document Processing/Full Text Index with Catalog...
Advanced/Document Processing/Manage Embedded Index...

about 12 years ago.

The Search worked as designed in older versions of Adobe Acrobat Reader, and still works if I open the .pdf in Acrobat 9 Pro.

Never had to activate or enable anything other than the second dialog for embedding.

Now the Search (ctl+shift+F) opens in new versions of Reader, but behaves as if it's scanning the entire .pdf for each query.

I've tried this on newer versions of Reader on Windows 7, 8.1, 10, and Servers 2012 R2 and 2019 with the same snail's pace for queries.

[Bernd Alheit]

Read this :

https://community.adobe.com/t5/acrobat-discussions/embedded-index-not-working/td-p/10227693

[Mike27587928ayhl]

Thanks Bernd, but that was not the problem.

The embedded index is now working as expected--almost instant results.

I don't believe it, but I had not logged into Adobe in the new versions of Reader!
In old versions of Reader there was no login. Same with Acrobat 9 Pro. Same for Framemaker 7.1.
Have no idea why one would get only partial functionality without logging in.
Seems like a bug, since I can't find any documentation stating that you must log in to get full function.

Thanks again for responding.

[Mike27587928ayhl]

Logging in did not work on all different versions of Reader.

The only thing that seems to work for all post 2018 versions of Reader is manually changing the registry as per nonotmethanks at https://community.adobe.com/t5/acrobat-discussions/large-old-book-w-embedded-pdx-from-acrobat-9-pro-....

While this works (creating the DWORD named bToggleUseEmbeddedIndex and change the value to 1 in FeatureLockDown) it isn't something I can give my customers and therefore not a real solution--it's a workaround.

Is there a script that can modify the registry for all the different versions of Reader--The path in the registry varies with each new update.