cannot open file

[leons33407568]

Hi there,

I work on this file last July 24, 2020 and the condition is still ok. In fact, I generate a pdf file and send it  to author for review. Now when I'm about to open the file, the message pop-up: 

I open file in order to implement some corrections given by the author. This file containing 650 pages and I'm desperate to use it again and save to another filename if really needed.

Please help, I need it badly.

[Steve Werner · Accepted solution]

Do you have a backup of your file? It sounds like to may have become corrupted.

That may sound crazy but any file, and especially very large files, can become corrupted. Backup is ALWAYS necessary. For example, if you had a Dropbox backup of the file, Dropbox would let you move back in time and let you open it to before where the corruption might have begun.