This has been happening for at least 5 years.  I have rebuilt so many files.  Usually happens when I accidentally print to XPS driver.  Or network issue happens.  Today, I even backed up the file first because I was doing major work on it.  Guess what, that backup doesn't work.  Not surprised.  Crappy fixed asset software, terrible programming.  Now I guess I will rebuild my 250 asset file one more time and waste about 3 hours.  Thanks Intuit.