Framemaker 12 keeps crashing when attempting to update book

Can anybody help? This has been happening for the past two days whenever I try to update a book. It seemed to crash when encountering a cross-reference, which I deleted, but it still thinks it is there and continues to crash. I sent the log file to fmerror@adobe.com, and I also found something in this forum that sounded similar, but there were no specific instructions on how to fix it -- something to do with structured versus unstructured? I am on Windows 7 Pro. Thanks!
