CC on a Mac. I have 100+ page document in InDesign. I'm illustrating it by creating the artwork in Illustrator and placing the artboards into InDesign. As of about an hour ago I am unable to place or update or relink to one particular Illustrator file. Whatever I try, I get an InDesign error saying "Unable to open PDF file". I've trashed my preferences, rebooted, and even made a copy of the Illustrator file and tried to relink to it. Same error message. I am able to open and work with the Illustrator file in Illustrator; I am able to work normally with other Illustrator files from within this InDesign document. PS: I created a new InDesign document; it, too, refuses to work with this particular Illustrator file and its copy.
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