Make sure that the Bento file is closed when you attempt to import from it. If it is open, you will see the message you report.
If it was closed, either the Bento file or the FileMaker file may be damaged.
Thanks for getting back to me.
Yes, Bento was closed when I tried opening the file.
Is there a way for me to determine if the Bento file is corrupt or not? Is there a way for me to fix it if it is?
I'm not a Bento user myself. I've only been able to share what I've learned here from other folk's posts. You might try posting that question in the Bento forum.