When I choose 'Add Untagged Items' from the Structure pane submenu, I get the error “The frame or frame content is not taggable.” With no explanation.
A quick bit of copying and pasting into a new document, and then trying the command, then selectively deleting text and trying again, has determined that a somewhat complex anchored object is the culprit. (It's simply a text frame grouped with another frame atop it.) Whittling down the object by removing some of its grouped objects doesn't help matters; i get the same error. However, copying one of those 'sub-objects' and then deleting the anchored grouped object, then re-pasting that copied sub-object in as a new anchored item (still with me?) is fine; the command is successful.
Similarly, removing the anchored object from the flow (so it's still a group but no longer anchored) yields success.
So apparently the grouped anchored object is simply cursed for some reason unbeknownst to me, the humble user. I knowe not what magick happens behind the wizard's curtain.
Anyone know what makes it not taggable, and what the fix is (for this 500-page book!)?
Thanks in advance.
Aaron