could someone help me resolve my error .provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

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SQL-Server-2008R2

add name="libacpConnectionString" connectionString="Data Source=103.21.58.192;Initial Catalog=libacp;User ID=libacp_pune020;Password=dfe3ga34dfTTS12@"
providerName="System.Data.SqlClient"

error

<pre>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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)</pre>

Posted 15-Mar-15 22:53pm

Member 8893861

Updated 15-Mar-15 22:58pm

v3

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2 solutions

Solution 1

Start here :
http://www.sqlmusings.com/2009/03/11/resolving-a-network-related-or-instance-specific-error-occurred-while-establishing-a-connection-to-sql-server/[^]

http://blogs.msdn.com/b/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx[^]

Posted 15-Mar-15 22:58pm

Mehdi Gholam

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Member 8893861 16-Mar-15 12:44pm

thank you

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OriginalGriff · Accepted Answer · 2015-03-15T23:01:00

The error is pretty specific, and does tell you exactly what the problem is, and what to do about it! :laugh:

The instance of SQL server you specified (the "DataSource" in the connection string) is not available to the computer that is running the code.
There are loads of possible reasons why, but the most common are:
1) The server is powered down
2) You specified the wrong server
3) You didn't change your connections string when you released software to production

So start by looking at exactly what the connection string contains, and check that against the network the code is executing on. Check the sever is OK, and the SQL instance is running (I have an intermittent problem with the LocalHost implementation on my dev machine: it doesn't always start on power up and I have to manually start it. I'll fix it one day, when I can find time...)