IS THIS A CORE- related problem - or should this be moved to "i18N"?

I also get this error message and wonder why, or what it means? Ref: (https://www.drupal.org/node/2468437)
And what to do about it?

The error message is related to "ad comments" in a book-child-page. And after adding a comment even views report error message from this created comment node-page:

"AD COMMENT ERROR MESSAGE:"

Undefined property: stdClass::$book i template_preprocess_i18n_book_navigation() 
rad 379 av ............./i18n_book_navigation/i18n_book_navigation.module).

VIEWS error message (I am not shore - but think they are related)

    Notice: Undefined offset: 1 i views_field_formatter_field_formatter_view() (rad 110 ..../modules/views_field_formatter/views_field_formatter.module).
    Notice: Undefined index: value i views_field_formatter_field_formatter_view() (rad 123 av ..../modules/views_field_formatter/views_field_formatter.module).

No translation is missing - all fields are dubbelchecked, tested with both site-language without any difference
Site info: DP 7.37 - 2 language, and in a node-conten-type "neutral" langauage and "child" to a page with 2 language - see below. Theme: AdaptiveTheme + AT_Panels_Everywhere + My_AT_PE_Subtherme.

-Main-Book - (2 language - content type 1)
--sub-Book - (2 language - content type 2)
---sub-child Book - (2 language - content type 3)
---- sub-child-child-Book - (1 language "neutral" - content type 4) ERROR Message HERE when ad a comment.

Thxs in advance for tip about this error ;)

Comments

TDI007’s picture

I get this error message too and the process we did was to switch the author of some book pages - maybe it is related to created comments on the book pages

Göran’s picture

The problem still remain in DP 7.39 and it is related to i18n_book_navigation.module.
About Authors #2: Normally the comment Author is newer the same as the author of the node?

Any suggestion?

dbielke1986’s picture

Version: 7.37 » 7.x-dev

Core issues are now filed against the dev versions where changes will be made. Document the specific release you are using in your issue comment. More information about choosing a version.