Book Module - Pages 40 to 61 of my book disappeared and cannot be recreated

[elise29823399]

I created and saved a 61 page book in the Book Module and even exported to a PDF.  Several days later when I was making edits to the book, all the pages from 40 to 61 "disappeared". The film strip shows the pictures are in the book but the pages are not visible. When I add new pages with the photos, they are visible but as soon as I move to Library Module or exit Lightroom Classic, the new pages disappear. The film strip shows that the added pictures have been now used twice but the book ends at page 39.

I have tried creating a duplicate collection and completing it with pages 40 to 61 but it also stops at page 39. 

This is my 20th book created with the Book Module and published on Blurb and nothing like this has every happened before.

Could someone please help me ?

[elise29823399]

PS : Blurb gives a page limit for my format and paper as 240 pages so that's not the problem. Help ?

[Rob_Cullen]

I don't have an answer! I have seen this in an old 2018 forum post without an answer-

https://community.adobe.com/t5/lightroom-classic-discussions/photos-disappearing-from-book/td-p/1018...

Can you identify anything on Page39 that is unusual? A 'missing' or corrupt image?

Assuming you might have already tried a Preferences reset. PREFERENCES RESET (Lr Queen) 

Catalog corruption is possible- and some suggestions to fix include - Creating a new (empty) catalog and do a File > [Import from another Catalog...] to merge in the (possibly corrupt) catalog.

I hope you find a fix.

[elise29823399]

Thank you. I'll try your suggestions and definitely let you know if I find a solution.

[elise29823399]

I've tried your 2 first suggestions as well as anything else I could think of.  The remaining possibility is your final suggestions to create a new catalog and do a file-Import-(from a catalog prior to the problem).  I've never done this before so I'm a bit apprehensive but will give it a try. In any event, that you so much for your support. Elise

[Rob_Cullen]

[Import from another Catalog] is not as daunting as it might sound.

Insure you have a backup of your current working catalog anyway. (Always important to do!)

The process will leave your 'old' catalog untouched and  merge your 'old' catalog data into the 'new' empty catalog. And hopefully the new catalog will work correctly for books.

[elise29823399]

It looks as though it is working. Thank you ever so much for your help.