Cannot Save book as a PDF in Framemaker 12 since Windows 10 upgrade

[TechWriterKat2]

Are there any known problems (with updates, please!) regarding creating a PDF from Framemaker 12 book file on Windows 10?

None of the files in the book will save as a PDF -- no error messages; just nothing happens. I was able to create a PDF from a new document (not in the book) with no problem, but when I try Save As PDF to any files in the book, it creates a 0 bytes pdf file.  Has anybody else seen this and/or have a solution? I had a chat session going, and then Chrome kicked me off. . .

[Matt-Tech Comm Tools]

Here's a list of things you can try. It's solved every PDF output problem I've ever encountered
http://www.techcommtools.com/framemaker-pdf-tips-and-tricks/