How to Resolve PDF Error - The File is Damaged and Could Not Be Repaired?

PDF Repair Toolbox is a a new Adobe Acrobat file repair tool that allows users to fix PDF files which are inpdfible from Adobe's file recovery. A common error message from Adobie is that Acrobat PDF file format is having difficulties, the file is damaged and could not be repaired by normal means.
https://www.acrobatrepairtoolbox.com/

There is a universal solution of your problem: PDF Repair Toolbox - The tool reads corrupted PDF files and saves all recovered information to a new file for Adobe Reader/Adobe Acrobat.

xp and 7 dont work well together,the file is damaged d/l a new one

Hey friend,
Did you take back up of original PDF document? If you have the back up copy, then you can easily restore your corrupted PDF file. If not, then a good solution is required to recover data from this file. I was having the same problem with my PDF document, I searched fro the solution over the internet and luckily I got one. I would like to share it with you - PDF Repair Toolbox
https://www.repairtoolbox.com/pdfrepair.html
This post helped me to fix my damaged PDF file and I am sure you will also find it helpful.
Thanks.
PDF Repair Toolbox

Guide for PDFTK (Freeware)
1) Download Gui for PDFTK from the Paehl website.
2) Double-click the downloaded installer to begin the program's setup.
3) Click "Start," select "All Programs" and click "Gui for PDFTK" to open the program.
4) Click the "..." button next to "PDF file" and locate your corrupt PDF. Click the "..." next to "Target" if you are not happy with the output file name.
5) Click "Repair a PDF." Wait for Gui for PDFTK to confirm repairing is complete.
6) Close Gui for PDFTK. Your repaired PDF will be in the same location as the original PDF unless specified otherwise.
As a variant might be...
Here is a tool PDF On-line repair service that may help the users to repair their corrupt PDF files easily - PDF Repair Toolbox. The tool reads corrupted PDF files and saves all recovered information to a new file for Adobe Reader/Adobe Acrobat.
PDF Repair Toolbox

Try another PDF file program, such as Foxit Reader, to see it it can open. If the same error occurs, the file is probably no good.

May be the file is actually damaged, or may be your PDF Reader is actually damaged.
First try to download the PDF file from different source(s) and then try opening that file.
If it doesn't work, go for different PDF Readers. Like you may try the Adobe Reader or Foxit Reader to open that file.

1. Download Adobe Reader 10.0 here
2. Download Foxit Reader 4.3 here

uninstall Adobe Reader and reinstall it or download it from www.filehippo.com
also checked for the default file extension ...
change .PDF to open with ADOBE reader always ..
after u install the adobe reader and complete teh setup
rt click on the file that you want to open click on open with
select ADOBE reader as default format ..apply.... ok...this will work

OSX, Quark 6.1