Missing Media Warning won't go away

I’m using FM 4.3.1 on an iMac running Mountain Lion. I’ve been working on a project for a day or two. Today I put the iMac “to sleep” (after saving my FM project) and when I woke up the machine, FM tells me that 7 images in the chapter I was working on are missing. So I recovered them. Now the images are there, but every time I try to play the chapter, from the beginning or at any slide, I get the “missing” warning. I cancel each each time and go about my business, but I’m getting tired of canceling. How can I turn off the mistaken warning?

PS: I think it has to do with the chapter designation. When I remove the chapter classification, the disease spreads to slides that weren’t included in the original chapter.