Captivate 9 failing to open file

Hi All,

Suddenly Captivate 9 is failing to open a file that had been working perfectly fine up until now. I keep getting an error message which states " Adobe Captivate could not open (file name). Please ensure that: The file is not already open; the file is not damaged; the hard disk has sufficient space, etc; none of which seems to be the case for this file. As I said, it had been opening with no problem up until this very moment.

Has anyone run across similar issues with Captivate?