Distiller gets stuck printing from book file

I'm having trouble printing to the PDF printer from a book file. It happens when I try to "print book" or "print selected files" or when I print a single file that's opened from the book file. My only workaround has been to open each file from outside the book, print them individually, and then combine them in Acrobat. That said, it seems to be a nebulous, intermittent problem. At one point, I deleted the first anchored frame and it worked, but then later it didn't. I also created a new book file, put some of the files into it, and it worked once but then stopped working.

The error messages in the distiller log files are pretty useless to me, except that it sort of tells me at what point in the document it got stuck. Sometimes it seems to be complaining about a cellbody command, but there's not a table anywhere near where it gets stuck. one time, it was something about a list paragraph tag; I renamed the tag to something else, and it worked once but then stopped working. Other times it's a more generic error. (Is there a source somewhere for deciphering these error messages?)

I'm using FM 2015 and Acrobat Pro DC 2019 on Windows 7.

Any ideas on how to fix this? Thanks.