"Error! Disk Full" when I generate figure list -- urgent help needed

I have tried to combine the chapters of my dissertation, but I get the following error message under the subtitle “List of Figures” at the end of the doc when I generate the figure list:

“Error! Disk Full. Free some disk space and recalculate this field.”

My dissertation has 200 small-sized jpeg images. I have combined the chapters using the “master document” function (in Word 2004). I also tried pasting the chapters (with unformatted citations) one after the other into a new doc. Neither method can handle the images.

Please help! I’m not sure where to poste this note, so I put it in more than one forum.