Having 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:

  • I have been working on it from a DAY but could not figure out the reason

    Server Error in '/' Application.

    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)

    Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

    Exception Details: System.Data.SqlClient.SqlException: 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)

    Source Error:

    An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

    Stack Trace:

    [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)]

    System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +5050218

    System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234

    System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity) +341

    System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject) +129

    System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout) +270

    System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +195

    System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +232

    System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +185

    System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +33

    System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +524

    System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66

    System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +479

    System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +108

    System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +126

    System.Data.SqlClient.SqlConnection.Open() +125

    System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +123

    System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +319

    System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +92

    System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +1618

    System.Web.UI.WebControls.ListControl.OnDataBinding(EventArgs e) +97

    System.Web.UI.WebControls.ListControl.PerformSelect() +34

    System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +74

    System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +66

    System.Web.UI.WebControls.ListControl.OnPreRender(EventArgs e) +29

    System.Web.UI.WebControls.ListBox.OnPreRender(EventArgs e) +12

    System.Web.UI.Control.PreRenderRecursiveInternal() +103

    System.Web.UI.Control.PreRenderRecursiveInternal() +175

    System.Web.UI.Control.PreRenderRecursiveInternal() +175

    System.Web.UI.Control.PreRenderRecursiveInternal() +175

    System.Web.UI.Control.PreRenderRecursiveInternal() +175

    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2496

    Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

  • Are you using SSMS or trying to connect via some application (third party/own)?

  • hey thankqqq i could resolve it

  • vineela.tatineni (12/21/2011)


    hey thankqqq i could resolve it

    Having a similar issue and I'm new to setting up connections between .Net Web Apps and SQL Servers, if you could describe what you did or needed to look at to determine how to fix you issue, that would be greatly appreciated.

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