When you try to open a compiled database file (.accde or .mde) or a compiled project file (.ade) in Microsoft Office Access 2007, you receive the following error message:
This database is in an unrecognized format.
The database may have been created with a later version of Microsoft Office Access than the one you are using. Upgrade your version of Microsoft Office Access to the current one, and then open this database.
The database may have been created with a later version of Microsoft Office Access than the one you are using. Upgrade your version of Microsoft Office Access to the current one, and then open this database.