I'm using LyX 1.6.8 on Windows 7 Pro x64. Today I installed Adobe Reader X - and it doesn't work with LyX any more: Adobe Reader does not open the generated PDF after you created the PDF with LyX. It only shows a welcome dialog like "Open last files - Acrobat services - etc".

First idea of course was "file association" - But the pdf file association is alright. Double clicking a pdf works from any place (also paths with spaces).

Anyone having ideas? Confirmthis? Maybe related to some 64 bit thing?

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    If its possible to send a Minimum Working Example we can diagnose the problem. Check with sumatrapdf viewer downloadable at blog.kowalczyk.info/software/sumatrapdf/…. Its good for latex needs. Jun 19 '12 at 21:47
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    Note that Reader locks open files for editing; LaTeX will throw an error if it can't write to the file. Jul 4 '13 at 17:46
  • I had a problem when I updated my reader, here's the solution I found from here replacing the file pdfview.exe with this one
    – Elad Den
    Jan 17 '16 at 6:22

Go to Acrobat Reader’s Edit/Preferences/General and un-check the box at the bottom that says “Enable Protected Mode at startup”.

Or use a better PDF viewer such as Sumatra which works well with LaTeX and can synchronise TeX source and PDF.

  • In Adobe Acrobat XI, it's Edit > Preferences > Security (Enhanced) > Protected View (Off) Mar 12 '16 at 19:57

The problem may be that you need to add the proper path to Adobe Reader in settings. Tools->Preferences->Paths and append the path to Adobe Reader. See the current path string that is already there and apply the same syntax (path1;path2;path3).


Simple steps:

  1. Close your running Lyx
  2. Open any PDF file within your computer with "right-click" - open with -> choose your Adobe Acrobat as default. Close the PDF file.
  3. Open Lyx - Tool - Preferences - Path - PATH Prefix
  4. From many paths listed, Change ONLY the path of Ghostscript to your Adobe Acrobat path. Apply - Save
  5. Tools - Reconfigure, close Lyx
  6. Reopen your Lyx file :D


  • 1
    Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. Apr 12 '14 at 7:18

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