The document could not be saved. A file I/O error has occured.

[KOK111]

I have a problem with saving PDF file. Whenever I try to save pdf file, "The document could not be saved. A file I/O error has occured." error  happens. I am using Windows 10 and a lastest pdf version. Also, I got a problem on a specific file. The other files work normally. Then, I searched to solve this proble, most of people said click 2D Graphics accleraton, but I don't have a button "2D Graphics accleraton" and I have 432GB available stoarge space. Please let me know how to solve this error.

[radzmar]

There propably a defect in the internal structure of that specific PDF. The Adobe Reader may be able to display the PDF but it can't successfully process the structure to create a new PDF so the saving process fails. With Adobe Reader there's nothing you can do to fix that, you'll need Adobe Acrobat. But even then it's not said that this PDF can be fixed, it depends on the kind of defect.