I erased all references to any Trump's Tarrif in all files on Nook. DNSB's file did run and booted fairly quickly. The Thumbnail showed up in Library and Recent Read. Next, I saved DNSB's file under a different name and saved it on my computer with my Sigil, but not making any changes. I cleared my Nook and uploaded to the Nook. The file worked with thumbnails showing.
So! The book is very small for so many files? Smashwords often breaks books into smaller files (those very long names come from Smashwords that DiapDeaer was complaining about. I modify files often and saves time to not change things.) But often files are broken in funny places. My Table of Content title shows, and then a page skip to show the content, and page breaks whenever a new file is jumped to. Hey, live with page breaks? I read lots of epubs with them. Yeah, I get a hair up my ass on little things. I know long files run better with multiple files for the body of the book.
OK, I will look the file of DNSB over carefully, compare it to my Smashwords files that also work, and then to mine that do not. What can I say? It takes years and years of experience.
Thanks for the help: Roger, Wilco and Out
