Establishing connection to SQL server suddenly failed

Hi,
I had a working SQL connection before, but today i've tried to connect and got this message:
TITLE: Connect to Server
Cannot connect to User-PC\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+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476
BUTTONS:
OK
p.s. I'm novice to SQL ssms.
with regards,
yaron H.

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
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Solutions2: List of members 1423.CAS_TEST.CAS_TEST September 28, 2012 2:50:15 PM CEST Succeeded
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In essbase logs there is nothing special, same for windows log.
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Connected from [10.100.50.2]
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Info(1013091)
Received Command [SQLRetrieve] from user [admin]
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Info(1021004)
Connection String is generated
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Info(1021041)
Connection String is [DSN=TEST_ORACLE;UID=...;PWD=...;]
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Info(1021006)
SELECT Statement [SELECT * from dual ] is generated
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Info(1021013)
ODBC Layer Error: [IM004] ==> [[Microsoft][ODBC Driver Manager] Driver's SQLAllocHandle on SQL_HANDLE_ENV failed]
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Info(1021014)
ODBC Layer Error: Native Error code [0]
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Error(1021001)
Failed to Establish Connection With SQL Database Server. See log for more information
[Fri Sep 28 17:52:55 2012]Local/CAS_TEST/CAS_TEST/admin/7564/Warning(1080014)
Transaction [ 0xb50001( 0x5065c7d7.0x31ce0 ) ] aborted due to status [1021001].
Have you an idea about the Merant driver to essbase?
Thank

Essbase Studio - Failed to Establish Connection With SQL Database Server

Hi all,
I am new to Hyperion and am having trouble deploying what seems a simple cube in Essbase Studio.
My environment is Windows 2003, EPM 11.1.1.2, SQL Server 2000.
I have the following two issues which may be related.
1. The EPM System Diagnostic tool says that Hyperion Foundation cannot connect to the SQL database.
Error:
Failed: Connection to database
Error: java.net.UnknownHostException: <server name: <server name>
Recommended Action:
Every other EPM application is able to connect to the database. I have tried re-configuring Foundation Services and checking the config files and nothing looks wrong. I would appreciate advice on how to fix this.
2 In Essbase Studio, I was able to connect to the database where the source data is, build the minischema and create dimensions and measures. But when I run the cube deployment wizard I get the error:
Message: Failed to deploy Essbase cube
Caused By: Failed to build Essbase cube dimension: (Time)
Caused By: Cannot incremental build. Essbase Error(1021001): Failed to Establish Connection With SQL Database Server. See log for more information
…ODBC Layer Error: [08001] ==> [[Microsoft][ODBC SQL Server Driver][TCP/IP Sockets]SQL Server does not exist or access denied.]
I have checked the DSN as well as the connections set up within Studio, and they are all able to connect to the database. I am using the admin user for the Essbase server and have created a different user for the databases where the data resides and the shared services database. I tried using the same user all the way through and this didn’t help.
Can you please advise what else I can check or change to resolve this issue.
Also, can you work in EAS with cubes that are created in Studio? I tried looking at it and I got an error that the rule file couldn’t be accessed because it was created in Studio.
After the above failures, I tried creating a cube in EIS, with mixed success. I have been able to load the members and data without errors. But when I try to view the data in the cube, I am seeing field names for the measures instead of the data itself.
...Definitely more questions than answers at this stage of my learning.
Regards
Michelle

Michelle,
I don't know if you found an answer to you question after so many months but I was hoping I could be helpful.
The issue you are experience happens often when the dimension that you are getting an error on, in this case TIME, is built from a snowflake lineage and there is a bad foreign key reference. This dimension is most like high-up in your outline build process for Essbase Studio and this prevents the build from happening usually early on.
Check your logs also. They are in Hyperion > Products > logs > essbase > essbasestudio.
You can also make your logs more verbose by setting a configuration variable in the essbase studio server.properties file but that should only be used for debugging as it really saps performance.
And, yes, you can of course edit an Essbase Studio deployed cube in EAS. However, any changes you make to the cube in EAS are subject to being wiped-out upon the next Essbase Studio deployment of that Applicaion/Database combo.
If you want to provide more detail, screenshots, etc. I would be glad to help where I can.
Cheers,
Christian
http://www.artofbi.com

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.
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Establishing connection to SQL server suddenly failed

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