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Error message when you try to open a compiled database file or a compiled project file in Access 2007: "This database is in an unrecognized format"
Article ID: 946205 - View products that this article applies to.
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.
This problem occurs if the compiled database file or the compiled project file was created on a computer that has the 2007 Microsoft Office suites Service Pack 1 (SP1) installed. This problem occurs when you try to open the file that you created, and the following conditions are true:
To resolve this problem, use one of the following methods.
Method 1Install the 2007 Office suites Service Pack 1 on the computer on which you are trying to open the file.
For more information about the 2007 Office suites Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/936982/ )Description of the 2007 Microsoft Office suites Service Pack 1
Method 2Install the hotfix package that Microsoft Knowledge Base article 943249 describes. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
943249Note After you install the hotfix that Knowledge Base article 943249 describes, any database or project that is compiled on the computer cannot be opened on a computer that still has the original version of Access 2007 installed.
(http://support.microsoft.com/kb/943249/ )Description of the Access 2007 hotfix package: January 28, 2008
To work around this problem, create the compiled database file or the compiled project file on a computer that does not have the 2007 Office suites Service Pack 1 installed.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Steps to reproduce the problem