I often have to add pages from one PDF to another PDF. I used to have no trouble adding pages to an existing saved PDF then pushing the save button and that being that. In the past month, after I add the page then try to save the PDF, I am now getting the error message "The document could not be saved. The file may be read-only, or another user may have it open. Please save the document with a different name or in a different folder."
I now have to rename the PDF that I've added pages to and go back and delete the old PDF that does not have the added pages, which is a little frustrating. I am using Acrobat X on Windows 7.
Any ideas how I can troubleshoot or address this problem?