Is there any way to Backsave an InDesign Book file?

[Document Geek]

It savs that it cannot open it as a book file. Do I need to recreate the book file in the older version?

[Steve Werner]

What InDesign version is the book file? What InDesign version are you trying to open it in?

Are the files in the book created in a newer version than the InDesign version you're running?

[Document Geek]

Apparently if the book file has been modified in any way in the new version (even through automatic document conversion of the files within it), it can't be reopened in the old version. Bummer.

[Barb Binder · Accepted solution]

Do I need to recreate the book file in the older version?

I don't think you can save a book back to an older version, so that's what I'd do. It's pretty quick—make the new book file and add the (coverted) chapters back in. The most you'd need to do from there is check the numbering, update the TOC (maybe index) and x-refs if you are using them. That might take, what—10-15 minutes?

~Barb

[Dave Creamer of IDEAS]

Simple answer is "no". Found that out the hard way a long time ago...