I have a E32b connected to a Ricoh 8120 (b&w). We make lots of books. They are pre imposed in Indesign and saved as PDF. They are 4 sheets duplexed center fold and stable
Letter size SEF.
Intermittently it adds a page (from the file, not blank) to the last page of the book.
I have have tried redistilling the PDF and running in APPE mode but still have the problem.
I have confirmed that the printer engine firmware is up to date and the Fiery is running version 2 (FS150) and has all the patches loaded.

Any help would be appreciated.