In the Book Format script line, the output type property is set to Sections but one of the sections rules works out to a section containing 0 pages. This can often be caused if all the diary's pages are accounted for by section rules, and you then add an all other pages section which has no other pages to refer to.
You will not be able to preview or generate a diary for the current script until this error is addressed.
Solution
•Modify the list of Physical Sections (recommended): Opens the physical sections property editor and lets you either delete the duplicate section, or define other rules for it.
•Change to Standard Flow: Changes the setting of the output type property from sections to standard, thus making the physical sections irrelevant.
Topic 146100, last updated on 22-Mar-2021