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I can also reproduce this issue. For example, I have a unit test that if run twice in succession will fail the second time. This unit test performs a few things: 1. Drops and recreates the database using a custom Entity Framework 4.1 DbContext Initiailzer 2. Launches a silverlight application 3. Click a button in the silverlight application At this point the silverlight application makes a call to a wcf ria service to query the database that was just created. However, every time the unit test is run a second time, I get the same error. But the error goes away immediately if I click the button again for example. Setting "Pooling=False" in my connection string did not resolve the issue in my case. However, I was able to resolve the issue by restarting the web server which hosts the silverlight application and ria service after the database is created. In my case, I just decided to use Cassini Dev Web Server v4 and run the tests on that web server instead of iis. Windows 7 Ultimate x64 Visual Studio 2010 SP1 Entity Framework 4.1 WCF RIA Services SP1 for Silverlight 4 Silverlight 4 MSTest Edit: Entity Framework 4.1 Update 1 contains a bug fix to remove the need to specify ‘Persist Security Info=True’ in the connection string when using SQL authentication. <a href="http://www.microsoft.com/download/en/details.aspx?id=26825" rel="nofollow">http://www.microsoft.com/download/en/details.aspx?id=26825</a> I am not (yet) sure if the bug is related and might resolve this issue as well.
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1. This table or related slice is empty.
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1. POSL4 WCF RIA Query Issue: "Completed" happening before it's really completed?
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1. PTAnswer
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1. USRami A.
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1. USRami A.
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