There was error in opening the document, the file has damaged and could not be repaired... This error i got while opening my pdf document, can you please help me in resolving it as that document is very important to me.

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/

What is the extension on the file? Maybe the power outage damaged the file. Try a right-click of the file, click Open With, locate Adobe Reader and select. Make sure "Always use this program" is checked.

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.

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

You ca use PDF Repair Toolbox restores unreadable Adobe Acrobat PDF files with documents.

For more: https://www.repairtoolbox.com/pdfrepair.html

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.

Download pdf file from your email then, save to USB flash drive. Install pdf installer. download from google and install. After installing try to insert ur USB flash drive and open your pdf file.

This problem mostly occurs in downloaded PDF files. The problem represents that the file didn't download perfectly. So please consider for one more trail of downloading with out error and have fine