This database file is not compatible with current instance of SQL Server

When you double click on mdf file then you might hit the below error message.


This database file is not compatible with current instance of SQL Server.

To resolve this issue, you must upgrade the database file by creating a new data connection.



1. Right click the mdf file.

2. On the connection dialog click Advance.

3. On the modify connection dialog click Advanced…

4. Data source choose .\SQLEXPRESS instead of (LocalDB).


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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9 Responses to This database file is not compatible with current instance of SQL Server

  1. NaN says:

    Many Thanks!

  2. nicole says:

    I am not sure if anyone is still going at this. but I have the same problem but their is no .\SQLEXPRESS there. what do I do .


  3. nicole says:

    i have the 2008 version. thanks i will try that.

  4. deepusiby100 says:

    right now I am facing a problem that a message ‘cannot able to find value for txtGeneral’ whenever I am giving ‘window.document.form1[‘txtGeneral’].value=some value to be checked .Kindly suggest a solution

  5. Vinit says:

    unable to find Data source .\SQLEXPRESS in advanced choose data source

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