I am designing a large, 150+ page document. I made it as part of a book, not really knowing what I was doing. I thought I needed to make it a book to get the text to flow from page to page and automatically number pages. I set up master pages. Now, it won't let me make a pdf of just a few pages, it says one or more of the pages aren't numbered correctly. I would like to make it just a plain document without any book qualities. Can I do that?
A Book (.indb file) is just a collection of links to individual .indd document files, so you can just delete it and work with the .indd.
What is the exact error message you get? Can you show us a screen shot of the Pages panel?