How To Establish Connection To SQL Server?

Mar 31, 2004

in the Quick start, it used connection string ("server=(local)NetSDK;database=pubs;Trusted_Connection=yes") to connect to the SQL db.





Now my working environment is, Im working on my client running .NET Framework as a webserver, and the SQL Server is on another PC as a db server (IP: xxx.xxx.xx.xx, user: webuser, pwd: webuser).





1st Question:


how do I build my connection string for this??


I tried following but no luck:


"user id=webuser;password=webuser;Initial Catalog=Bei;Data Source=xxx.xxx.xx.xx;Integrated Security=SSPI;";








2nd Question:


I just happened to see that ODBC is no more recommended in ASP.NET ?? if that's the case what is the new way to connect to DB ?? by using connection string or what ??








Thanks heaps!


Bei

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Establish Connection With SQL Server From VB.Net Application

Jun 11, 2008

I have application that is connecting to SQL Server and runs bunch of stored procedures, but I don't think that am able to connect to my database server. When it hits the line to execute the stored procedure it comes up with syntax error saying the syntax error is at the stored procedure. I know how to set up the connection string with web app from the web config, but never done it on an app. Here is the connection string pointing to my server which I pass to my SqlConnection object: "Data Source=ServerXXXX;Initial Catalog=DB;Integrated Security=True; User ID=xxxx; Password=xxxx;"  And that is the code that is using the above connection string:   Public Sub MigrateNFSData(ByVal calcTbl As DataTable, ByVal strDBConnection As String)        Dim sqlServerConn As New SqlConnection(strDBConnection)        'Define stored procedures        Dim command As New SqlCommand        Dim getAccID As New SqlCommand("GetAccountID", sqlServerConn)        Dim getActionID As New SqlCommand("GetActionID", sqlServerConn)        Dim getExchangeID As New SqlCommand("GetExchangeID", sqlServerConn)        'Dim getParrentAccID As New SqlCommand("GetParentAccID", sqlServerConn)        Dim getStatusID As New SqlCommand("GetStatusID", sqlServerConn)        Dim getTraderID As New SqlCommand("GetTraderID", sqlServerConn)        Dim getGroupID As New SqlCommand("GetGroupID", sqlServerConn)        'Define insert records stored procedures        Dim insertAcc As New SqlCommand("InsertAccount", sqlServerConn)        Dim insertAction As New SqlCommand("InsertAction", sqlServerConn)        Dim insertExchange As New SqlCommand("InsertExchange", sqlServerConn)        Dim insertGroup As New SqlCommand("InsertGroup", sqlServerConn)        Dim insertStatus As New SqlCommand("InsertStatus", sqlServerConn)        Dim insertTrader As New SqlCommand("InsertTrader", sqlServerConn)        Try            sqlServerConn.Open()        Catch ex As Exception            'Exception message goes here        End Try        'Set parameters to helper Get Stored Procedures to retreive Id's         getAccID.Parameters.Add("@AccName", SqlDbType.NVarChar)        getAccID.CommandType = CommandType.StoredProcedure        getActionID.Parameters.Add("@ActionName", SqlDbType.NVarChar)        getActionID.CommandType = CommandType.StoredProcedure        getExchangeID.Parameters.Add("@ExchName", SqlDbType.NVarChar)        getExchangeID.CommandType = CommandType.StoredProcedure        'getParrentAccID.Parameters.Add("@ParentName", SqlDbType.NVarChar)        'getParrentAccID.CommandType = CommandType.StoredProcedure        getStatusID.Parameters.Add("@StatusName", SqlDbType.NVarChar)        getStatusID.CommandType = CommandType.StoredProcedure        getTraderID.Parameters.Add("@TraderName", SqlDbType.NVarChar)        getTraderID.CommandType = CommandType.StoredProcedure        getGroupID.Parameters.Add("@GroupName", SqlDbType.NVarChar)        getGroupID.CommandType = CommandType.StoredProcedure        command = New SqlCommand("InsertTradeTransaction", sqlServerConn)        command.CommandType = CommandType.StoredProcedure        'Set Parameters for Insert stored procedures        insertAcc.Parameters.Add("@Account", SqlDbType.Text)        insertAction.Parameters.Add("@ActionName", SqlDbType.Text)        insertExchange.Parameters.Add("@Exchange", SqlDbType.Text)        insertGroup.Parameters.Add("@Group", SqlDbType.Text)        insertGroup.Parameters.Add("@ACCID", SqlDbType.Int)        insertStatus.Parameters.Add("@StatusName", SqlDbType.Text)        insertTrader.Parameters.Add("@Group", SqlDbType.UniqueIdentifier)        insertTrader.Parameters.Add("@IP", SqlDbType.Text)        insertTrader.Parameters.Add("@TraderName", SqlDbType.Text)        'Adding stored Get Stored Procedure's parameters-----------------------        command.Parameters.Add("@OrderNum", SqlDbType.Text)        command.Parameters.Add("@ACC_ID", SqlDbType.Int)        command.Parameters.Add("@Group_ID", SqlDbType.UniqueIdentifier)        command.Parameters.Add("@Trader_ID", SqlDbType.UniqueIdentifier)        command.Parameters.Add("@Exch_ID", SqlDbType.Int)        command.Parameters.Add("@Date", SqlDbType.DateTime)        command.Parameters.Add("@Time", SqlDbType.DateTime)        command.Parameters.Add("@ActionID", SqlDbType.Int)        command.Parameters.Add("@StatusID", SqlDbType.Int)        command.Parameters.Add("@TimeSent", SqlDbType.DateTime)        command.Parameters.Add("@Qty", SqlDbType.Int)        command.Parameters.Add("@Product", SqlDbType.Text)        command.Parameters.Add("@MMYYY", SqlDbType.Text)        command.Parameters.Add("@ExchOrderID", SqlDbType.Text)        command.Parameters.Add("@TimeTicks", SqlDbType.Int)        command.Parameters.Add("@W2G", SqlDbType.Int)        command.Parameters.Add("@W2Exch", SqlDbType.Int)        command.Parameters.Add("@G2ExchDerived", SqlDbType.Int)        command.Parameters.Add("@ExchDate", SqlDbType.DateTime)        'command.Parameters.Add("@ParentID", SqlDbType.Int)        'Paremeters Defenition--------------------------------------        'Write table with computed NFS data to sql server DB        For Each dr As DataRow In calcTbl.Rows            command.Parameters("@OrderNum").Value = dr.Item("OrderNo").ToString()            getAccID.Parameters("@AccName").Value = dr.Item("Acct").ToString()            If getAccID.ExecuteScalar() = 0 Then                insertAcc.Parameters("@Account").Value = dr.Item("Acct").ToString()                insertAcc.ExecuteNonQuery() //THIS IS WHERE IT FAILS and pops up with the message that there is syntax error at this procedure                getAccID.Parameters("@AccName").Value = dr.Item("Acct").ToString()                command.Parameters("@AccName").Value = getAccID.ExecuteScalar()            Else                command.Parameters("@ACC_ID").Value = getAccID.ExecuteScalar()            End If            getGroupID.Parameters("@GroupName").Value = dr.Item("GroupID").ToString()            Try                command.Parameters("@Group_ID").Value = getGroupID.ExecuteScalar()            Catch ex As Exception                'Insert new Account if given account not being found from get stored procedure            End Try            getTraderID.Parameters("@TraderName").Value = dr.Item("TrdID").ToString()            Try                command.Parameters("@Trader_ID").Value = getTraderID.ExecuteScalar()            Catch ex As Exception                'Insert new Account if given account not being found from get stored procedure            End Try            getExchangeID.Parameters("@ExchName").Value = dr.Item("Exch").ToString()            Try                command.Parameters("@Exch_ID").Value = getExchangeID.ExecuteScalar()            Catch ex As Exception                'Insert new Account if given account not being found from get stored procedure            End Try            getActionID.Parameters("@ActionName").Value = dr.Item("Action").ToString()            Try                command.Parameters("@ActionID").Value = getActionID.ExecuteScalar()            Catch ex As Exception                'Insert new Account if given account not being found from get stored procedure            End Try            getStatusID.Parameters("@StatusName").Value = dr.Item("Status").ToString()            Try                command.Parameters("@StatusID").Value = getStatusID.ExecuteScalar()            Catch ex As Exception                'Insert new Account if given account not being found from get stored procedure            End Try            'getParrentAccID.Parameters("@ParentName").Value = ""            'Try            'command.Parameters("@ParentID").Value = getParrentAccID.ExecuteScalar()            ' Catch ex As Exception            'End Try            command.Parameters("@Date").Value = DateTime.Parse(dr.Item("Exch Date").ToString())            command.Parameters("@Time").Value = DateTime.Parse(dr.Item("Time").ToString())            command.Parameters("@TimeSent").Value = DateTime.Parse(dr.Item("Time Sent").ToString())            If (dr.Item("Qty").Equals(System.DBNull.Value)) Then                command.Parameters("@Qty").Value = System.DBNull.Value            Else                command.Parameters("@Qty").Value = Int32.Parse(dr.Item("Qty").ToString())            End If            command.Parameters("@Product").Value = dr.Item("Product").ToString()            command.Parameters("@MMYYY").Value = dr.Item("MMYYYY").ToString()            command.Parameters("@ExchOrderID").Value = dr.Item("ExchOrderID").ToString()            If (dr.Item("TimeTicks").Equals(System.DBNull.Value)) Then                command.Parameters("@TimeTicks").Value = System.DBNull.Value            Else                command.Parameters("@TimeTicks").Value = Int32.Parse(dr.Item("TimeTicks").ToString())            End If            command.Parameters("@ExchDate").Value = Date.Parse(dr.Item("Exch Date").ToString())            command.Parameters("@W2G").Value = 2            command.Parameters("@W2Exch").Value = 2            command.Parameters("@G2ExchDerived").Value = 2            command.ExecuteNonQuery()            sqlServerConn.Close()        Next    End Sub Thank you guys as always being helpful. 

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so I logged in to my account and found a database links and I created one (SQL Server)




Host Name
whsql-v44.prod.mesa4.secureserver.net



Database Name
DB_43434



Database Version
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Description
maindb
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hi all

here is the following error, what should i do.

 

TITLE: Connect to Server
------------------------------

Cannot connect to KANGALERTSQLEXPRESS.

------------------------------
ADDITIONAL INFORMATION:

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: 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
------------------------------

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Hi! (my first post)
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Object reference not set to an instance of an object.



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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:




Line 2443:Line 2444://If connection is not open then attempt to open it.Line 2445:if (connection.State == System.Data.ConnectionState.Closed)Line 2446:{Line 2447:try







Source File: d:UseruscomApp_CodePHP.cs    Line: 2445
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Hi!

My name is George. I have installed Microsoft Visual Web Development 2008 Exress Edition Beta, and when I want to use the Web Site Administration Tool and test the AspNetSqlProvider it says me this:

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--- End of inner exception stack trace ---
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Unable to connect to SQL Server database.

----------------------------------------
Details of failure
----------------------------------------

System.Web.HttpException: Unable to connect to SQL Server database. ---> System.Data.SqlClient.SqlException: 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)
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SQL Server Error: 17
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'-------------------------------------------------------------------------------------
 I create a Login screen from Toolbox.
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 '----------------------------------------------------------------
 
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Regards,
Vicky
 

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Enterprise Manager:
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to establish connection ConnectionOpen (CreateFile())

Query Analyzer:
Unable to connect to server ServerName
Server Msg 67, Level 16, State 1
[Microsoft][ODBC SQL Server Driver]Client unable to establish connection


I can't register any other new servers, even ones in my workgroup. I'm connecting using named pipes, but have also tried using TCP/IP setting it up using Client Network Utility.

When i log on to another machine using my network login - I can connect.

There have been no problems connecting in the past and I haven't changed anything on my machine - any ideas???

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Client Unable To Establish Connection

Oct 18, 2000

Hi Guys.

We have a clustered server. When i create DTS packages in the secondary server I can get all the connection. But when i create DTS package that has connection to other servers. I am getting the follwing error. So my jobs that runs the DTS packages are failing.

Error Source: Microsoft OLE DB Provider for sql server

Error Description: Client Unable to establish connection.
Connectionopen(createfile())

I deleted all the entries in the Client network utility and recreated with ip addresses and TCP/IP protocol.

Added all the ip addresses to Lmhosts and host files.

Check the Server Network Utility.

I dont have a clue now.

Anyhelp are well appreciated.

-Thanks
-MAK

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Jul 23, 2005

When I login using QA to my SQL Server database, it takes 15-20 secondsto establish a connection and open a query window. Drilling into adatabase via Enterprise Manager is similar. Once the connection isestablished, the server runs plenty fast however.Can someone tell me why it could take a long time for a connection tobe established?This behavior occurs when I am local on the box.Thanks,John

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Aspnetdb Connection Could Not Establish But Database Correctly Created.

Sep 2, 2007

I installed netframework 2.0 Visual Web developer and MSSQL 2005 express edition with SQL Server management express.I have got this configuration: 2*256 mb ram Intel Pentium 3.2Ghz Windows XP HUN SP2 latest version.server name: localhostSQLEXPRESSAuthentication: Windows AuthenticationI run aspnet_regsql.exe and the setup wizard created aspnetdb see here, Microsoft sql server management studio can see the database:But! When I run to the asp.net web application administration tool in Provider Configuration and chooseAspNetSqlProvider only 1then I click Select a single provider for all site management data link -> then testThe Tool write this:Could not establish a connection to the database.
If you have not yet created the SQL Server database, exit the Web Site
Administration tool, use the aspnet_regsql command-line utility to
create and configure the database, and then return to this tool to set
the provider. 

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The Underlying Connection Was Closed: Could Not Establish Secure Channel For SSL/TLS.

Nov 20, 2007



Help.

Today while trying to get the Windows NT security working i upgraded my reporting services IIS server to a domain controller and it screwed up all of my settings. First it changed password for ASPNET user and so I reinstalled .net framework.

Now i get the



The underlying connection was closed: Could not establish secure channel for SSL/TLS.


error message.

I do not want to use an SSL certificate for I do not have one right now. How can I configure my SQL Server 2000 Reporting services to not use SSL. I see they added something to SQL Reporting Services 2005 in the configuration tools but I cant find out how to modify the config files with SQL 2000 RS to eliminate the SSL.

Please help, my company is down waiting for me to get this back up.

Thanks a ton,

deep

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SQL 2012 :: Client Unable To Establish Connection Due To Prelogin Failure

Oct 28, 2015

I unable to setup a linked server on sql server 2012. The destination server is on sql server 7.0. I can able to setup the same linked server on sql 2005 sp4 and sql 2008 r2 but unable to setup on 2012. I am getting the below error message. OLE DB provider "SQLNCLI11" for linked server "" returned message "Client unable to establish connection due to prelogin failure".

Msg 10054, Level 16, State 1, Line 0

TCP Provider: An existing connection was forcibly closed by the remote host.

OLE DB provider "SQLNCLI11" for linked server "" returned message "Client unable to establish connection".

Msg 26, Level 16, State 1, Line 0

Client unable to establish connection because an error was encountered during handshakes before login. Common causes include client attempting to connect to an unsupported version of SQL Server, server too busy to accept new connections or a resource limitation (memory or maximum allowed connections) on the server.

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DB Engine :: Client Unable To Establish Connection Due To Pre-login Failure

Oct 28, 2015

I unable to setup a linked server on sql server 2012. The destination server is on sql server 7.0. I can able to setup the same linked server on sql 2005 sp4 and sql 2008 r2 but unable to setup on 2012. I am getting the below error message. OLE DB provider "SQLNCLI11" for linked server "" returned message "Client unable to establish connection due to prelogin failure".

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The Underlying Connection Was Closed: Could Not Establish Trust Relationship For The SSL/TLS Secure Channel

Nov 17, 2006

I'm using SQL Server 2005 (SP1) Reporting Services on Windows Server 2003 SP1. I access the report server from Internet using SSL, but the server is not exposed directly to the internet. It is behind a firewall, where the required ssl port is setup and is working fine.

In my Reporting Server, the /ReportServer folder works perfect and I can navigate and view all reports. It is the /Reports folder the one that does not work fine. I can enter the /Reports folder, and can list all the reports. But, when I select one of the reports, and it starts rendering, I get the error message:

"The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. The remote certificate is invalid according to the validation procedure."

How can I fix this?

Thanks,

Julio

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Accessing MSDB Shows Client Unable To Establish Connection... Encryption Not Supported Error

Nov 23, 2006

Hi,

I currently have SQL2005 Std, using 2 separate domain accounts for both SQL server and SQL agent. When accessing the MSDB stored packages folder from mgmt studio, I get the following error:

Client unable to establish connection.
Encryption not supported on SQL server.

I did google for this error, but have tried all suggestions, including updating the MsDtsSvr.ini.xml file with the servername. I am using a default instance.

Also, I am only able to access the MSDB folder if I set the SQL service account to the local admin account. I have also set the SQL service account to be part of the local admins group, but without any luck.

TIA.

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Irregular Error In SQL 2000-Named Pipes Provider, Error: 40, Could Not Establish Connection

Apr 10, 2007

I have a web application developed in VS.NET 2005 [using C# as code behind]; and it uses SQL Server 2000 Enterprise edition as backend.
The application runs fine, though it gives an error on IRREGULAR intervals on SQL data requests.
Error Details:
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)
 
My problem is this:
1) Why does it show an error of SQL 2005, while I use SQL 2000. SQL 2005 is not even installed on the server, though VS.NET 2005 is installed.
2) The error comes only at irregular intervals. Users are able to login properly otherwise.
3) Application starts working again if we do either of the following:  (a) Restart IIS   (b) Restart application pool   (c) Restart server.
4) Named pipes and TCP/IP are added to the "Network Configuration" of the SQL server 2000.
5) Error does not come on any specific page; or any specific code; or at any specific time.
6) We do not have any background service or any other activity happening on the server; and the server hosts only this application, within a single virtual root.
 
Any thoughts on why is this happening, and how to resolve this?

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Not Able To Establish Connecton To SQL Server DB

Mar 13, 2006

Hi ,
 
 I got the following error message while trying to establish connection SQL DB : "Could not establish a connection to the database. If you have not yet created the SQL Server database, exit the Web Site Administration tool, use the aspnet_regsql command-line utility to create and configure the database, and then return to this tool to set the provider. "
 
in fact i have ran the utility and added the connection successfully and from the VWD i can see the table for the connections but when i run the ASP.NET Configuration it gives me the above error
 
appreciate ur kind advise
 
tks & rdgs

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Jan 14, 2015

I am a bit stumped by error generated when attempting to connect to the report url.

The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

The only thing I can think of is a certificate is issued to the server (all domain devices) via group policy by cert authority running on the domain.

If I check the bindings within Report Services Configuration Manager the certificate is referenced.

I have tried removing 443 but I am still unable to connect.

A neutron walks into a bar. "I'd like a beer" he says. The bartender promptly serves up a beer. "How much will that be?" asks the neutron. "For you?" replies the bartender, "no charge."

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Mar 5, 2004

I recently upgraded my Laptops operating system to Win XP Pro, and ran into data connectivity problems with my desktop SQL Server 7. To resolve the connectivity problems I removed SQL 7 and reinstalled SQL 7. My connectivity problems have been resolved however I lost the database from my server. The data base exists but it is not recognized from the SQL Server Enterprise Manager.

Is there an easy way to re-establish the database?

Any assistance would be greatly appreciated, I have posted this thread here because there is little activity on the SQL 7 journal it seems that I am behind the curve.

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Can' Establish Endpoint

Feb 28, 2008



I have two servers both installed sql server.The name of the servers are A and B respectively.
The admin of sql server in A is 'domainuserA', and admin of sql server B is 'domainuserB'.


My purpose is create a mirroring for a database in server A, but i can establish endpoint in server A(network address can not be reached or does not exist), i have grant the 'connect to endpoint' permission to each login .




i past my code:

step1



Code Snippet
--Server A, principal
create database db_test
backup database db_test to disk='\sharefolderdb_test.bak' with init

create endpoint endpoint1
as tcp(listener_port=5002)
for database_mirroring
(role=partner)

alter endpoint endpoint1
state=started

create login [domainuserB] from windows
grant connect on endpoint::endpoint1 to [domainuserB]






step2



Code Snippet
--Server B, mirror
restore database db_test from disk='\sharefolderdb_test2.bak' with norecovery

create endpoint endpoint1
as tcp(listener_port=5002)
for database_mirroring
(role=partner)

alter endpoint endpoint1
state=started

create login [domainuserA] from windows
grant connect on endpoint::endpoint1 to [domainuserA]

alter database db_test set partner='TCP://A.corp.com:5002'


--step3



Code Snippet
----Server A, principal

alter database db_test set partner='TCP://B.corp.com:5002'


this step return a error message:

The server network address "TCP://B.corp.com:5002" can not be reached or does not exist. Check the network address name and that the ports for the local and remote endpoints are operational.







some wrong?

any suggestions would be appreciated.

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Feb 22, 2001

Hi there,

Can anyone help me configure merge replication between two servers with same server name (select @@servername returns same server name) . When I am trying to establish the replication I am getting error message.

I cannot change the server names because both are production servers, so reinstalling SQL Server is out of question.

Thanks, Jay

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