Illustrator linked images converted to black boxes
I recently upgraded. I have a newly generated .ai file (made in this new version) with multiple linked images. This .ai file has been working properly for two weeks, over multiple close/opens of the document, when this morning the document opens and some, but not all, linked images have been converted to black boxes.
Some artboards are still correct:

and others are completely messed up:

The links window seems to indicate that the images have been converted to embedded. I didn't embed them myself- I prefer to keep them as links.

The image files weren't moved, and even if they were moved I am always able to re-link.
help???!! this is an important time-sensitive issue that needs to be resolved asap
thanks,
Laura
