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Using adobe reader 9 on a document which read fine on version 7 returns the error "root missing or invalid"

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Solution 1
Upgrade to StuffIt 8.5, then unstuff the archive again. See Allume's Web site at
for more information.

Solution 2
Change the cross-platform preference in StuffIt, Magic Menu, or StuffIt Deluxe then re-extract the PDF file:
1. In StuffIt or Magic Menu, choose File > Preferences. In StuffIt Deluxe, choose Edit > Preferences.
2. Click the Cross-Platform icon on the left of the Preferences dialog box.
3. Select Never in the Convert text files to Macintosh format section, then click OK.
4. Re-extract the PDF file:
- If you're using StuffIt, drag the archive onto the StuffIt icon.
- If you're using Magic Menu, select the archive and then choose Expand from the Magic Menu.
- If you're using StuffIt Deluxe, press Control+Command while double-clicking the archive.

Regards
Samson Ved

Posted on Dec 17, 2008

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What is acrobat reader?


Adobe Acrobat is a family of computer programs developed by Adobe Systems, designed to view, create, manipulate and manage files in Adobe's

Plug-in from Adobe. It reads documents in PDF format on any platform.


A program from Adobe that lets you capture a document and then view it in its original format and appearance


Adobe has changed the names of the products in the Acrobat family regularly, also splitting-up, joining, or discontinuing products. Between version 3 and 5, Standard and Professional versions were one product simply called Adobe Acrobat.
As of October 2009[update], the current main members of the Adobe Acrobat family are:
64px-adobe_reader.svg.png magnify-clip.pngAdobe Reader 8/9 Icon
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The latest version
Version 9.0 Adobe Acrobat 9.0 was released July 2008:[10][11]
  • PDF version 1.7 (and prior) supported. There are Adobe extensions to PDF 1.7 for Acrobat 9.
  • Product Family includes: Acrobat Standard 9 (Windows only), Acrobat Pro 9, Acrobat Pro Extended 9 (Windows only).
  • Pro Extended Version includes Adobe Presenter and the features of Acrobat 3D.
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  • On June 9, 2009, update version 9.1.2 was released which addresses a number of critical security vulnerabilities.[15]
  • On July 31, 2009, update version 9.1.3 was released which addresses a number of critical security vulnerabilities.[16]
  • On October 14, 2009, Adobe Acrobat 9.2 was released (added support for Windows 7 x86/x64 and fixed many security issues).[17]
  • On January 12, 2010, Adobe Reader 9.3 was released which addresses a number of critical security vulnerabilities.[18]
  • On February 16, 2010, Adobe Acrobat 9.3.1 was released which addresses two critical security vulnerabilities.[19]
  • On April 13, 2010, Adobe Acrobat 9.3.2 was released which addresses several critical security vulnerabilities.[20]

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