In the Computing section of this site, there's an article titled Insufficient Data which describes how I figured out fixing a nasty PDF problem. When I was doing my TAA course in early 2010, I used this as the basis of a 15 minute practice lesson.
The first thing that always need to be done is to check that your course materials are still correct. But when checking it out, I stumbled on a much simpler solution.
Other PDF reader applications such as Foxit Reader ignore the Insufficient Data fault and show no error message. It's then possible to use a "print to PDF" program (I used CutePDF) to print the PDF to another PDF, and this makes the problem go away in Acrobat Reader. Both Foxit Reader and CutePDF are freeware. So the pain of separating out long documents to a large number of individual page files and then reassembling them in the correct sequence wasn't necessary after all.
So that shortened what I needed to teach, letting me focus on showing the error message pop up and exploiting the expletive-what-do-we-do-now moment.