Here is the answer from development:
"Sounds like an object is holding onto a serial number of a deleted object. You should be able to select some of the data and export that to VCL. If you select the object that has the issue, the VCE export will fail."
Are you able to Undo to the last point at which the file would save? Can you give us an idea of what kinds of tasks you were working on before the problem occurred?
David