This InDesign scanning message occurs if a textbox's page number is reported as being 0.
This usually means that the box is fully outside the bounds of either pages of the spread, but that the page is logged nonetheless as it is part of a group that is not itself fully off the spread.
➢This message however indicates that the page number of the parent group could not be found.
This message should be addressed by making sure that none of the objects of your template are fully off the spread.
Topic 185860, last updated on 25-Jun-2022