A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible.

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) +4846887
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +194
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +4860189
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +90
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +342
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +221
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +189
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) +31
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +433
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +499
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +65
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +117
System.Data.SqlClient.SqlConnection.Open() +122
System.Data.Common.DbDataAdapter.QuietOpen(IDbConnection connection, ConnectionState& originalState) +31
System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +112
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +287
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +92
System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +1297
System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +19
System.Web.UI.WebControls.DataBoundControl.PerformSelect() +142
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
System.Web.UI.WebControls.GridView.DataBind() +4
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +72
System.Web.UI.Control.EnsureChildControls() +87
System.Web.UI.Control.PreRenderRecursiveInternal() +44
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842
Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082

On what website/link did you received this error message ??

Similar Messages

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. (p

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)(Microsoft SQL Server, Error: 2)
The system cannot find the file specified
Cannot connect to COWBOYS.
Here are the technical details===================================
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) (.Net SqlClient Data Provider)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476
Error Number: 2
Severity: 20
State: 0
Program Location:
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover)
at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer
timeout)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance,
SqlConnectionString userConnectionOptions, SessionData reconnectSessionData)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.Open()
at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
===================================
The system cannot find the file specified
I have tried from so many forms. This is so frustrating. Thank for everyone/anyone who wants to help. So this is what happened: I had to uninstall my previous sqlserver 2012(which worked great) for some reason, and I uninstalled everything from that download.
Then I installed the trial edition of sql server 2012 (64 Bit) and It wouldn't connect to the database. (Error mentioned above.) My local DB is COWBOYS. (COWBOYS is also my computer name.) After this, I have tried downloading sqlexpress and sqlserver 64bit
many times and cannot connect to my local DB.
How do I connect to my Local DB?
Also, I think this might help: (When I run sqlserve.exe, which I was able to find in C:\Program Files\Microsoft SQL Server\110\LocalDB\Binn, I get an error: Your SQL server installation is either corrupt or has been tampered with(Error getting
instance ID from name). Please uninstall then re-run setup to correct this problem.
I would happily re install it, if it wasn't my 20th time.
I don't have any remote connections, I don't use username/password, only window authentication. I work mostly on visual studio, but without able to store /retrieve data, I don't know how to survive.
May be the solution is very simple, but I am too frustrated.
Some of the things I have tried:
From a command prompt, enter one of the following commands:
net start "SQL Server Agent (MSSQLSERVER)" OR
net start "SQL Server Agent(instancename)"(for instance)
on my sql configuration, I cannot start anything because there is nothing there to start. I can post more details, if that would help. Also, some more details about the error:
Details
Product:
SQL Server
ID:
2
Source:
MSSQLServer
Version:
10.0
Component:
SQLEngine
Message:
An error has occurred while establishing a connection to the server. When connecting to SQL Server, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error:
40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
Explanation
SQL Server did not respond to the client request because the server is probably not started.
User Action
Make sure that the server is started.
Version:
9.0
Component:
SQLEngine
Message:
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error:
40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
Explanation
SQL Server did not respond to the client request because the server is probably not started.
User Action
Make sure that the server is started.
Any one that can help me, I will be greatful. Thank you so much. p.s. please ask me anything if you have any questions.

It sounds like there are a couple things going on here. First check if you have a successful install of SQL Server, then we'll figure out the connection issues.
Can you launch SQL Server Configuration Manager and check for SQL Server (MSSQLSERVER) if default instance or SQL Server (other name) if you've configured your instance as a named instance. Once you find this, make sure the service is started.
If not started, try to start it and see if it throws an error. If you get an error, post the error message your hitting. If the service starts, you can then launch SSMS and try to connect. If you have a default instance, you can use the machine
name in the connection dialog. Ex: "COWBOYS" where Cowboys is the machine name. However, if you named the SQL Server instance during install, you'll need to connect using the machine\instance format. Ex: COWBOYS\Romo (where Romo
is the instance name you set during install).
You can also look at the summary.txt file in the SQL Server setup error logs to see what happened on the most recent install. Past install history is archived in the log folder if you need to dig those up to help troubleshoot, but the most
recent one may help get to the bottom of it if there is an issue with setup detecting a prior instance that needs to be repaired.
Thanks,
Sam Lester (MSFT)
http://blogs.msdn.com/b/samlester
This posting is provided "AS IS" with no warranties, and confers no rights. Please remember to click
"Mark as Answer" and
"Vote as Helpful" on posts that help you. This can be beneficial to other community members reading the thread.

Azure Webjobs with EF DB - A network-related or instance-specific error occurred while establishing a connection to SQL Server

Hi,
I have been trying to get a very simple WebJob developed and deployed onto Azure with little to no luck. I have a MVC Website which has a common project which handles my Data Access Layer with Entity Framework. I have created a WebJob project
using Visual Studio and added the following lines of code to the Manual Trigger Function
[NoAutomaticTrigger]
public static void ManualTrigger(TextWriter log, int value, [Queue("queue")] out string message)
RitualDBEntities db = new RitualDBEntities();
log.WriteLine("Function is invoked with value={0}", value);
List<Location> locations = db.Locations.ToList();
string msg = string.Empty;
foreach (Location location in locations)
msg += location.Name;
message = msg;
log.WriteLine("Following message will be written on the Queue={0}", message);
In my app.config of my WebJob i have the following connection strings:
<add name="RitualDBEntities" connectionString="metadata=res://*/RitualDBEntities.csdl|res://*/RitualDBEntities.ssdl|res://*/RitualDBEntities.msl;provider=System.Data.SqlClient;provider connection string="data source=ritual-pc\sqlexpress;initial catalog=RitualDB;integrated security=True;persist security info=False;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
<add name="RitualContext" connectionString="Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=RitualDB;Data Source=ritual-pc\sqlexpress" providerName="System.Data.SqlClient" />
<add name="AzureWebJobsDashboard" connectionString="DefaultEndpointsProtocol=https;AccountName=ritual***;AccountKey=tQAP0gyMYKtWPJeIbsqk2iT2k69gyd1FwcyRf3+5Mc9b9EdYzpj0Dq8X2VHUmF*****"/>
<add name="AzureWebJobsStorage" connectionString="DefaultEndpointsProtocol=https;AccountName=ritual***;AccountKey=tQAP0gyMYKtWPJeIbsqk2iT2k69gyd1FwcyRf3+5Mc9b9EdYzpj0Dq8X2VHUmF*****" />
When i test locally (F5 Debugging) the webjob runs successfully and does the loop of the objects returned from the database. When i deploy this Azure the WebJob fails with the following error:
[03/29/2015 22:07:39 > 6ca05b: SYS INFO] Status changed to Initializing
[03/29/2015 22:07:41 > 6ca05b: SYS INFO] Run script 'Ritual.WebJobs.Members.exe' with script host - 'WindowsScriptHost'
[03/29/2015 22:07:41 > 6ca05b: SYS INFO] Status changed to Running
[03/29/2015 22:07:44 > 6ca05b: INFO] Found the following functions:
[03/29/2015 22:07:44 > 6ca05b: INFO] Ritual.WebJobs.Members.Functions.ManualTrigger
[03/29/2015 22:07:44 > 6ca05b: INFO] Executing: 'Functions.ManualTrigger' because This was function was programmatically called via the host APIs.
[03/29/2015 22:08:01 > 6ca05b: INFO] Function had errors. See Azure WebJobs SDK dashboard for details. Instance id is e99d7205-3ca0-4674-9414-f0381d5c2316
[03/29/2015 22:08:01 > 6ca05b: ERR ]
[03/29/2015 22:08:01 > 6ca05b: ERR ] Unhandled Exception: System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.SqlClient.SqlConnection.Open()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.<Open>b__36(DbConnection t, DbConnectionInterceptionContext c)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext](TTarget target, Action`2 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.EntityClient.EntityConnection.<Open>b__2()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of inner exception stack trace ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<GetResults>b__5()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Ritual.WebJobs.Members.Functions.ManualTrigger(TextWriter log, Int32 value, String& message)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at lambda_method(Closure , Object[] )
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.VoidInvoker.InvokeAsync(Object[] arguments)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithWatchersAsync>d__23.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithOutputLogsAsync>d__1c.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLogMessageAsync>d__c.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLogMessageAsync>d__c.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<TryExecuteAsync>d__1.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.Host.Executors.ExceptionDispatchInfoDelayedException.Throw()
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.JobHost.<CallAsyncCore>d__7.MoveNext()
[03/29/2015 22:08:01 > 6ca05b: ERR ] --- End of stack trace from previous location where exception was thrown ---
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Microsoft.Azure.WebJobs.JobHost.Call(MethodInfo method, Object arguments)
[03/29/2015 22:08:01 > 6ca05b: ERR ] at Ritual.WebJobs.Members.Program.Main()
[03/29/2015 22:08:01 > 6ca05b: SYS INFO] Status changed to Failed
[03/29/2015 22:08:01 > 6ca05b: SYS ERR ] Job failed due to exit code -532462766
If i remove any of my database code and use just the basic Stub code my webjob will run successfully so i know that my connection strings (outside of the DB ones) are correct. My MVC web application also runs perfectly using the same connection strings
in Azure so i also know that they have also been configured.
I am now lost and need some guidance, so if someone is able to assist me that would be much appreciated.
Thanks
Ritual.

Can you try to log the connection string you are using in both cases to make sure they are the same?
Also can you share your site name, either directly or indirectly?
This will help us investigate.
Thanks,
Amit

A network-related or instance-specific error occurred while establishing a connection to SQL Server.

Dear all,
I know that this topic may be a bit old school; but it really make me mad as I tried all solutions i found and it still cant be resolved....please give a hand...
The situation is like this,my company divided different platform as a status of project, like DEV, SIT and UAT. I got a project that require me to upgrade an vs2003 project to vs2005. I upgraded it completely and
successfully, it works fine in development and UAT platform; EXCEPT, the SIT platform.
The situation is very strange that, once I move the source to SIT, it return the following error:
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)
but it never happen in either DEV or UAT platform and even do I copy the workable web.config from DEV or UAT platform to SIT, the error still here and unable to resolve it.
I search a lot in the internet by Google, but solution suggested are not suitable or fail in my case. Most answer suggest that "enable remote control", "check fire wall", "check server" etc......But as I can connect well the
DBServer in DEV and UAT properly, I dont think those are the cause(but still, I check them all, and all are enabled properly, except my firewall setting is OFF, so adding port is ignored).
After all the searching and testing, I believed and have reason to believe that, the cause is inside my web.config:
<appSettings>


<clear/>
<add key="Environment" value="UAT v1.31"/>
<add key="DBServer" value="DB_UAT"/>
<add key="cnBPSS.ConnectionString" value="data source=DB_UAT\BPSS;persist security info=True;user id=theloginid;workstation id=RP_UAT;packet size=4096;pwd=theloginpwd"/>
<add key="UTBPSSConn.ConnectionString" value="data source=DB_UAT\BPSS;persist security info=False;user id=theloginid;workstation id=RP_UAT;packet size=4096;pwd=theloginpwd"/>
<add key="UTDSBDBConn.ConnectionString" value="workstation id=RP_UAT;packet size=4096;user id=theloginid;data source=DB_UAT\DSBDB;persist security info=False;password=theloginpwd"/>
<add key="cnDSBDB.ConnectionString" value="workstation id=RP_UAT;packet size=4096;user id=theloginid;data source=DB_UAT\DSBDB;persist security info=False;password=theloginpwd"/>
<add key="Timer1.Enabled" value="True"/>
<add key="Timer1.AutoReset" value="True"/>
<add key="cnbpss.ConnectionString" value="data source=DB_UAT\BPSS;password=theloginpwd;persist security info=True;user id=theloginid;workstation id=RP_UAT;packet size=4096"/>
<add key="cnbpss1.ConnectionString" value="data source=DB_UAT\BPSS;password=theloginpwd;persist security info=True;user id=theloginid;workstation id=RP_UAT;packet size=4096"/>
</appSettings>
</configuration>
I know such kind of setting is old school; But due to this program runs for few years from tons of ppl...I dont dare to modify it unless I am very sure they are the cause.....
May I ask if anyone cna give me some advice and help in this issue please? I already tried for weeks and turning mad....Please I really need some help...
Many thanks.
Ksun Chan

Checklist of possible reason of this error
1. Check SQL services are running
2. Check SQL Browser service is running
3. Check remote connections are enabled
4. Network connectivity between database & application servers by TRACERT command
5. Check TCP/IP protocol enabled at SQL server
6. Check talent connectivity – telnet <IP address> <port no on SQL server running>
7. Check UDP port 1434 is open or not on SQL Server
8. Check firewall is running or not Check
9. If firewall running, SQL Server & UDP port must be added in exception in firewall
Regards,
Rohit Garg
(My Blog)
This posting is provided with no warranties and confers no rights.
Please remember to click Mark as Answer and Vote as Helpful on posts that help you. This can be beneficial to other community members reading the thread.

Connecting to the LOB system has failed. A network-related or instance-specific error occurred while establishing a connection to SQL Serve

Hi!
I'm using consume adapter service> sqlbinding > to connect to sql database in order to generate sql schemas.
I'm getting below error:
Connecting to the LOB system has failed.
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).
Christiane

Hi,
As suggested earlier this seems to be a DTC related issue. It can only occur if the DTC settings are not proper or if firewalls don't allow the default ports to communicate.
Check DTC settings on both SQL and BizTalk Box and also check if MSDTC service is up and running.
Go to Start
à Run
à (type in) Dcomcnfg. You should be inside Component Services MMC.
Expand Component Services
à Computers
à My Computer (right click)
à Properties
à MSDTC tab
à Security Configuration button.
Select the checkboxes as following :
Check the below article from Microsoft Support Team, they have listed all the errors which may come during setting up a new system. They also have your MSDTC error listed.
Resolving the issues you may face during BizTalk Runtime Configuration
Thanks,
Prashant
Please mark this post accordingly if it answers your query or is helpful.

Response Group: A network-related or instance-specific error occurred while establishing a connection to SQL Server.

Hi all,
I have three central sites with each having a Front End server pool (standard).
Site A and Site B are paired for resiliency. Site C is on its own.
On two of my Front Ends (Site A and Site B), when I click on response group tab i get the following warning on the top of the page:
"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)"
I have check out the following articles about dont think they apply to me:
http://unifiedme.co.uk/2014/01/network-related-instance-specific-error-occurred-accessing-lync-control-panel-response-group-tab/
I dont see any Event logs that would direct me to a cause.
Which database it is complaining about? RGSDYN and RGSCONFIG are local databases as it is an standard installation. What could be the possible cause for this issue?
Thanks in advance.

My latest change was the addition of Site C.
Going through logs (i must have missed it the first time, with all the noisy EWS errors), i found event ID 31147. I am investigating network issues although I have MPLS running to that location.
Does Lync set up open correct ports on the machine itself?

Connecting to the LOB system has failed. 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

hi ,
when generate the schema , i got the below error, please any one put your inputs:
Connecting to the LOB system has failed. 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).

thaks shanky,
but facing another , after generate schema from WCF_SQL, im unable get elements in my schema.
this is schema generate from storeprocduer , but thru WCF-sql im unable get the elements like
id, name
<xsd:schema targetNamespace="urn:schemas-microsoft-com:sql:SqlRowSet2" xmlns:schema="urn:schemas-microsoft-com:sql:SqlRowSet2" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sqltypes="http://schemas.microsoft.com/sqlserver/2004/sqltypes" elementFormDefault="qualified">
<xsd:import namespace="http://schemas.microsoft.com/sqlserver/2004/sqltypes" schemaLocation="http://schemas.microsoft.com/sqlserver/2004/sqltypes/sqltypes.xsd" />
<xsd:element name="Test.dbo.sample">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="id" type="sqltypes:int" minOccurs="0" />
<xsd:element name="name" minOccurs="0">
<xsd:simpleType>
<xsd:restriction base="sqltypes:nvarchar" sqltypes:localeId="1033" sqltypes:sqlCompareOptions="IgnoreCase IgnoreKanaType IgnoreWidth" sqltypes:sqlSortId="52">
<xsd:maxLength value="1000" />
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
<Test.dbo.sample xmlns="urn:schemas-microsoft-com:sql:SqlRowSet2">
<id>18</id>
<name>BIRADAR</name>
</Test.dbo.sample>
<Test.dbo.sample xmlns="urn:schemas-microsoft-com:sql:SqlRowSet2">
<id>18</id>
<name>BIRADAR</name>
</Test.dbo.sample>
<Test.dbo.sample xmlns="urn:schemas-microsoft-com:sql:SqlRowSet2">
<id>19</id>
<name>sw</name>
</Test.dbo.sample>
<Test.dbo.sample xmlns="urn:schemas-microsoft-com:sql:SqlRowSet2">
<id>18</id>
<name>BIRADAR</name>
</Test.dbo.sample>
<Test.dbo.sample xmlns="urn:schemas-microsoft-com:sql:SqlRowSet2">
<id>14</id>
<name>swe</name>
</Test.dbo.sample>
<Test.dbo.sample xmlns="urn:schemas-microsoft-com:sql:SqlRowSet2">
<id>13</id>
<name>se</name>
</Test.dbo.sample>

Network related or instance specific error occurred while establishing a connection to sql server

Hi all,
I am getting a SQL error - 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).
Problem is when a user tries to connect with remote SQL Server
through VPN from Domain, it throws this error, and when the same machine tries to connect with Remote SQL Server through VPN as a standlone machine, it is getting connected.
I checked all the settings but ....... There is no any policies deployed in Active Directory.
Any suggetion?
Rajneesh
Rajneesh Kumar MCITP - SA, MCSE, CNA

check these
1) Make sure your server name is correct, e.g., no typo on the name.
2) Make sure your instance name is correct and there is actually such an instance on your target machine.
[Update: Some application converts \\ to \. If you are not sure about your application, please try both Server\Instance and Server\\Instance in your connection string]
3) Make sure the server machine is reachable, e.g, DNS can be resolve correctly, you are able to ping the server (not always true).
4) Make sure SQL Browser service is running on the server.
5) If firewall is enabled on the server, you need to put sqlbrowser.exe and/or UDP port 1434 into exception.
http://uk.linkedin.com/in/ramjaddu

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.

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)
How Can i solve this?

1. Make sure SQL Server Service is running
2. If a named instance, make sure SQL Server browser service is running
3. Make sure SQL Server is configured to allow remote connections
4. Examine the SQL Server error log for messages confirming that SQL is listening on the expected network interfaces and ports
5. Test server connectivity with PING from the client machine
6. Test port connectivity using TELNET or PowerShell to the server and port (from step 4) from the client machine. For example
a. TELNET <server-name> 1433
b. PowerShell: 1433 | % { echo ((new-object Net.Sockets.TcpClient).Connect("YourServerName",$_)) "server listening on TCP port $_" }
7. Check firewall settings if step 5 or 6 connectivity test fails
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
Improves MS SQL Database Performance
SQL Server Integration Services:
Business Intelligence

Central Administration shows error 26 - A network-related or instance-specific error occurred while establishing a connection to SQL Server

Hello
i Follow
this Article to Config FBA , BUT after Step 3 , My Central Administration shows an Error :
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)
Correlation ID: 89651359-9c57-4241-8254-eb3be052c4f0
Now , i cannot access to my Central Admin Setting , but my site Collections works well....
i Rollback all setting but no Effect !!!!!
i execute iisreset but nothing !!!!
what should i do?
please help me.. Thanks in Advanced
When i was checking EventViewer , i saw an Event log :
The Forefront Identity Manager Service cannot connect to the SQL Database Server. The SQL Server could not be contacted. The connection failure may be due to a network failure, firewall configuration error, or other connection issue. Additionally,
the SQL Server connection information could be configured incorrectly. Verify that the SQL Server is reachable from the Forefront Identity Manager Service computer. Ensure that SQL Server is running, that the network connection is active, and that the firewall
is configured properly. Last, verify the connection information has been configured properly. This configuration is stored in the Windows Registry.
Is there any relation between this message And my Problem!!!???

hi Mr Thuan
Soldier
i checked
some of your Solution like SQLService (Was OK) , Allow Remote connection (was OK & has check mark), Restart SqlService (Done Successfully), Network Card Driver (my Connection is OK) before , but didnot check SQL
Service account & i will do Soon,
but
i did not any changes on Firewall or IP ... i change IIS setting (through
this
Article ) ,
Do these settings have any effect on IP or firewall ?
thanks
mohamamd
MBS - social.technet.microsoft.com Forum

A network-related or instance-specific error occurred while establishing a connection to SQL Server2012

TITLE: Connect to Server
Cannot connect to RAVI\SQLEXPRESS.
ADDITIONAL INFORMATION:
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) (Microsoft SQL Server, Error: -1)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476
BUTTONS:
I installed it many times correctly,every thing installed succeeded but when trying to connect getting the above error...
please help me to solve this..:(((

Hi,
Following should be taken care of
1. Make sure TCP/IP and named pipes protocol is enabled
2. Make sure browser service is up and running
3. Make sure SQL express service is up and running
4. If you are connecting from remote make sure exception in firewall should be made.
5. If your SQL Server is listeing on port apart from 1433 make sure you connect like
RAVI\SQLEXPRESS,portno
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

SQL Server Agent Log showing errors [298] SQLServer Error: 10061, A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL

Hi All,
I have started receiving this error in the logs for the last 10 days and the Schedules Jobs for the database have stopped running. My MS CRM application is working fine.
Can anyone guide me what could be the problem.
Date                      17/4/2014 2:04:20 PM
Log                         SQL Server Agent (Current - 17/4/2014 2:01:00 PM)
Message
[298] SQLServer Error: 10061,
A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct
and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online. [SQLSTATE 08001]
Date                      17/4/2014 2:11:55 PM
Log                         SQL Server Agent (Current - 17/4/2014 2:01:00 PM)
Message
[298] SQLServer Error: 10061,
A network-related or instance-specific error
has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information
see SQL Server Books Online. [SQLSTATE 08001]
Date                      7/4/2014 11:00:31 AM
Log                         SQL Server Agent (Current - 17/4/2014 2:01:00 PM)
Message
[298] SQLServer Error: 10061,
A network-related or instance-specific error
has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information
see SQL Server Books Online. [SQLSTATE 08001]

Check this link
http://social.msdn.microsoft.com/Forums/en-US/906da9b5-2482-468c-a424-ae099da2d96b/sql-server-agent-service-account-error?forum=sqlsetupandupgrade
Regards, RSingh

"a network related or instance specific error in sql server 2008..." error in sbs 2011 standard.

Hi All,
When we try to open "Sql Server 2008 R2" in SBS 2011.......... we are getting the error message" “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) ”
How can we resolve the issue?
Thanks in advance.
Ram.
Ramakrishna

Hi Ram, you can check the solutions in the following links and see if that helps:
A network-related or instance-specific error occurred while establishing a connection to SQL Server
http://social.technet.microsoft.com/wiki/contents/articles/a-network-related-or-instance-specific-error-occurred-while-establishing-a-connection-to-sql-server.aspx
A network-related or instance-specific error occurred while establishing a connection to SQL Server
http://social.msdn.microsoft.com/Forums/en-US/sqldataaccess/thread/3a1c4d72-300c-4f9b-a0ac-23027ce04d1c/
Also, rather than a SBS specific issue, it seems only relate to SQL server, you can also post it to SQL server forum so that SQL server experts there can provide more accurate solutions:
http://social.technet.microsoft.com/Forums/en-US/category/sqlserver
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

"Network-related or instance specific error", Works OK for Administrator

I've been handed a legacy .Net Windows application that was previously used on Windows XP, and asked to debug a few problems encountered on Windows 7 clients. The original developers are all gone. I'm down to only a single
error -- a seemingly common one:
"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)"
Curiously, this error only occurs for ordinary users. When the application is started using "Run as Administrator" it connects to the database immediately. We believe we can configure the app to always start as an administrator,
but obviously we'd like to run it without that if we can. However, I haven't seen any good suggestions why the database connection would only fail this one way.
Any ideas? I've seen at least one troubleshooting guide that suggested trying with Run as Administrator, but it didn't say how to proceed if that fixes it. Am I just supposed to stop at this point? If I was having a UI problem I might understand
that some old apps just aren't going to work in Windows 7, but this is just connecting to the database. Seems like we should be able to do this. I just don't know what to check.
Thanks in advance.
EDIT:
I have looked more closely at this, and perhaps there are more clues. I use the same user account to log on to two Win7 machines. One is a developer workstation with VS10 installed. The other is representative of a client workstation the app will
run on. My user account is actually an administrator on both machines.
At runtime we invoke advapi32.dll logonuser impersonation to logon to SQL server with a dedicated account.
What we're seeing is that I can run the app freely on the developer workstation. Even with UAC on, and even if I am not using "run as administrator". This may point to something about how the SQL drivers/provider are installed
on that machine.
When I run on the regular user workstation, even though I am an administrator myself, I must "run as administrator" to launch it. And when I do, I get a UAC prompt. When we turn UAC off, of course, the app runs fine.

Hi,
I think you are in the similar case with:
http://support.microsoft.com/kb/2009672
By default SSIS always uses the low privileged token resulting in a failure when connecting to a SQL Destination. Full administrator access token is required in your case.
Unlike earlier versions of Windows, when an administrator logs on to a computer running Windows 7 or Windows Vista, the user’s full administrator access token is split into two access tokens:
a full administrator access token and a standard user access token.
During the logon process, authorization and access control components that identify an administrator are removed, resulting in a standard user access token. The standard user access token is then used to start the desktop, the Explorer.exe process. Because
all applications inherit their access control data from the initial launch of the desktop, they all run as a standard user.
After an administrator logs on, the full administrator access token is not invoked until the user attempts to perform an administrative task. When a standard user logs on, only a standard user access token is created. This standard user access token is then
used to start the desktop.
To get around this, you may configure an application to always run elevated.
http://technet.microsoft.com/en-us/library/cc709691%28WS.10%29.aspx
Thanks.
Tracy Cai
TechNet Community Support

Network-related or instance-specific error

Hi,
When I run my application through IIS by specifying the server IP and virtual directory in the browser, I am getting the following error:
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).
But when I run on visual studio it is working well. What might be the problem? I am connecting to SQL Server 2000 instance on another server.

But when I run on visual studio it is working well.
If Windows authentication is used to logon to SQL Server and you run your Project in VS, then your account is used to logon to SQL Server and I guess you have permissions to logon.
If it runs in IIS, then the Service account of IIS is used to logon and may the account don't have permissions to do so. You should find an entry in SQL Server ErrorLog about the failed logon.
Grant permissions for that account or Change the account for the web side.
Olaf Helper
[ Blog] [ Xing] [ MVP]

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible.

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