Windows Form Connects to SQL DB on only some PC's

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I have a windows form that connects to SQL just fine on about 5/10 PC's but on the other pc's i get the following error:

System.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

I've been searching for ways to resolve this but I'm not really sure what to do.

Let me know if any other information is needed.

Please Help!!

Posted 7-Dec-12 8:20am

Dustin Prevatt

Updated 7-Dec-12 8:32am

André Kraak

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Zoltán Zörgő 7-Dec-12 15:58pm

And what is the common difference between those PCs, that can connect and those that can not? First of all, I suggest you check with Sysinternals's PROCEXP (http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx) to see where the TCP session is failing. If these PCs are on the same network, it is possible to be a firewall issue...

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André Kraak · Accepted Answer · 2012-12-07T08:45:00

Solution 1

This technet article How to Troubleshoot Connecting to the SQL Server Database Engine[^] might help you troubleshoot the problem.

Posted 7-Dec-12 8:45am

André Kraak

Comments

Dustin Prevatt 7-Dec-12 15:02pm

Thanks, I have tried those steps before and still can't connect.

Dustin Prevatt 11-Dec-12 10:26am

Turns out this was a dns issue on my end. Thanks for the help!