Unrecognized database format

Copper Contributor

Using Access on windows 10:  yesterday it worked fine, today it won’t open the file but displays this: 


Unrecognized database format (filename).accdb

Any suggestions? 

2 Replies

This is why we keep good backups.
You can try Repair and Compact (on a copy, of course), but if that doesn't work, you'll need to restore a backup.

You have already rebooted your computer, right?


can’t open the copy or original to do a repair.