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[Help!] Odd PDF problem   [Help!]

By: Laurent Duchastel     Montréal, Québec  
Date: May 03,2023 at 18:20
In Response to: [Help!] Odd PDF problem (Alan Clark)

> Hi everyone
> I manage a lot of PDF files and I'm accustomed to viewing them by
> simply pressing 'O' for open in Ztree. Recently, I've found this
> doesn't work any longer. I'm using the latest Zeta version 2.4.211 but
> the problem exists in my registered version too, which is 2.2.1
> What seems to happen is an instance of Acrobat opens, as I can see in
> the task manager, but the file name/location does not seem to be passed.
> Has anyone else experienced this? I appreciate that this may not be
> simply a Ztree problem and may well be a Windows 11 issue.
> Any help greatly appreciated.
> Best wishes
> Alan Clark

Works fine here.

Suggestion : right-click on any PDF file | Properties | Modify to reassign Acrobat as default.

Alternatively, I suggest the following:

Download and install SumatraPDF
At installation time, click Options | Let Windows show previews of PDF documents
Once installed, make SumatraPDF default (same way as above for Acrobat), THEN change it again back to Acrobat.

What it does:
1. Changing pdf reader for alternative ones sometimes "fixes" lost of right association
2. Bonus, now pdf thumbnails are shown with content at very fast speed in Explorer, things to Sumatra. ;-)

If nothing works, try uninstall/reinstall Acrobat itself.
You could also "clean" bad Acrobat registry entries and files before reinstalling with Adobe Cleaner Tool

Laurent Duchastel


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