I usually create a number of illustrations for a single project on individual artboards in illustrator and then save them separately as eps files. When I try to do that lately, I get an error message that says "could not save the illustration. Cannot complete the requested operation". This happens when I try to save them all at once (the whole range of artboards in a document), or one at a time. I've tried all the usual shutdowns, re-installs, etc.