? Possible that the data EXPORTED was corrupt? (I read that as the (####) enclosed is way to high a value. )
Hang in there, until a few others have a chance to weigh in. 6.4 is real new and you risk making things worse, when the fix might be simple.
It might be a good idea to run the first phase (at minimum) of Library Maintenance before Exporting.
A corrupt backup does no one any good
