I cannot save my PDF's with their original file name.
I get the pop-up, "The document could not be saved. The file may be a read only or another user may have it open. Please save this document with a different name or in a different folder."

I know that the document is not a read only and is not opened by another user.

There are many solutions posted on line, but none of them work.

What can I do? Please help.