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

Posted By:      Posted Date: October 21, 2010    Points: 0   Category :Sql Server		 
I installed a new installation of SQL 2008R2 server on Windows 2008R2 server. First I can not connect to it with SQL management Studio 2005 so I wanted to install 2008R2 and I can not install it and that first. I used a PC with SQL management Studio 2008R2 but I can not connect to the database and I receive 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. Verfiy the instance name is correct and that SQL server is configured to allow remote connection. error 40 - could not open a connection to SQL server Microsoft SQL server, error 2


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

  
I know what the problem is. I am just not sure how to fix it. I get the error below when I have this: < roleManager enabled="true" />  It works fine when I set rolemanager = false but I need to use membership roles.   my connection strings are:  <connectionStrings> <add name="ConnMSSQLASP" connectionString="Data Source=MISFS;Initial Catalog=ASPNetDB;User Id=----;Password=-----;" providerName="System.Data.SqlClient"/> <add name="DisasterRecoveryConnectionString" connectionString="Data Source=MISFS;Initial Catalog=ASPNetDB;User Id=----;Password=----" providerName="System.Data.SqlClient"/> </connectionStrings>    Can someone help me with this? ERROR Below: 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) 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. SQLExpress database file auto-creation error: The connection string s

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

  
A co worker tried installing sql2008 express on his home laptop and had a problem, i downloaded the install and installed again (didnt remove orig install ( prob should have))  now when i try to connect using Server type : Database Engine  Server name : . or .\SqlExpress with window auth i get the message:Cannot connect to ..Additional Info : A network - related or instance-specific error occurred while establishing a connection to sql server

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

  
I got this error when i try to connect to sql server10.0  from c# 2008 express. any idea.Pedro

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

  
I have two database one on sql server 2000 and other on 2005. When i am connecting my application through web serviceit gives exception:"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)"with sql server 2000 no such problem occurs. I have cheked the firewall and web.config connection string also.

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

  

I just opened the project. Yesterday everything worked fine. It does not work any link database.
Today I open the project and displays:

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)

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

Source Error:

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

  

Hi,

I've created a small website with a simple sqlite database using vwd 2010 .net 4. In dev and test envionments everything works fine, however when i promote to my hosting provider i receive 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)

I've been configuring the connection strings (autogenerated from entity framework and attached db) but unable to get it working on the hosting provider, I'm assuming it's related to permissions but not entirely sure how to resolve - here's the web.config as it stands:

<add name

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

  

Well, there are many post about this issues but mine is a bit different that I have this problem on my hosting which I can't configure their MS SQL Server. The only thing I can access is Plesk control panel. I have uploaded my mdf file in httpdocs/App_Data, while I establishing the connection it say..

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

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

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

  

I have looked all over and tried every suggestion to resolve this issue but it persists:

I am trying to connect to an sql server on a windows 7 machine from an asp.net application.  When I am in Visual Studio I can use the connection in sqldatasource controls and everything is fine when I test the queries.  However, when I attempt to run the application I get the error.

I've tried:

1) Turning on named pipes on the database server and restarting the server.

2) Stopping all firewalls on the server.

3) Making sure that the server is configured to allow remote connections.

My connectionstring is:

Data Source=MYSERVERNAME\mssqlserver;Initial Catalog=NEMO;User ID=sa;Password=password

I have tried using portqryv2 to see whats happening on the UDP port that sql server uses as suggested in another post but gets a syntax error from the utility.

I am baffled by this one and would greatly appreciate some help.

Thanks.


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

  
Hi
I am configuring SharePoint form Based Authentication for my clients internet site where users can authenticate through the sql DB. I am running windows server 2008, SharePOint 2007, WSS 3.0, SQL 2008 and Visual Studio 2005. I had followed this article to configure FBA on the server : http://www.andrewconnell.com/blog/articles/HowToConfigPublishingSiteWithDualAuthProvidersAndAnonAccess.aspx , 

all is well till the time i sign in on the internet site, it throughs an error msg for which I have benn trying very hard to sole it still no luck. the error msg im getting is:

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)   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.Td

OLE DB Error: Network-Related or Instance-Specific while Deploying SSAS 2008 Cube

  
Hi, I encountered the below listed error while attempting to deploy SSAS 2008 DB: Error 1 OLE DB error: OLE DB or ODBC error: Login timeout expired; HYT00; 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.; 08001; Named Pipes Provider: Could not open a connection to SQL Server [5]. ; 08001.  0 0  I am running a standalone MSSQL 2008 named instance on Windows Server 2008 R2. Here are the steps I have taken but yet the issue is not resolve: 1) Enable Remote connections on the server 2) Enable TCP\IP 3) SQL Browser is Running 4) Set Firewall Inbound Exceptions for SQL Browser, Default Port 1433, UDP Port 1434 5) Using Management Studio I can successfully connect to the MSSQL named instance from the app server 6) I can ping I MSSQL box from the app server 7) Read and implemented all steps in the MSDN post below: http://blogs.msdn.com/b/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx Thanks for your help.

A connection was successfully established with the server, but then an error occurred during the pre

  
One of our IIS App pools serving a SharePoint site on one of the  Web Front End  went down suddenly at around 1pm today. Not entirely sure if  it's related yet or how, but we see a bunch of SQL errors from the Web server around that time as follows..    Event Type:         Error Event Source:     Windows SharePoint Services 3 Event Category:                Database Event ID:              5586 Date:                     8/24/2010 Time:                     12:57:21 AM User:                     N/A Computer:          xxxxx Description: Unknown SQL Exception -2146893056 occured. Additional error information from SQL Server is included below.   A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: SSL Provider, error

An error occurred within the report server database. This may be due to a connection failure, timeo

  

 

I can't get Reporting Services to work with Sharepoint.

I've followed the instructions for installation of Reporting Service in SharePoint Integrated Mode, and completed the indicated steps on the SharePoint Central Administration Site successfully.  When I try to create a page with a Reporting Services Webpart, I get the following error:

===========================

Invalid object name 'History'.
----------------------------
An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. (rsReportServerDatabaseError)

============================

I have SQL 2008 R2, SharePoint Enterprise 2010, and Report Builder 3.0.  SQL and Sharepoint are installed on the same server.

I'm certain that there isn't a disk or timeout problem, so I'm assuming that it's a connection failure, but don't know what steps to take to troubleshoot and correct this.

Thanks


error establishing a connection to SQL Server

  

help me out here Experts

I was able to publish a web application with many projects inside it and which connects to oracle database

now, I put it on remorte IIS 2003 server but it gave this error that has to do with aspnetdb file

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)

and then I tried it on my local windows7 IIS local host and I got this error

Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. Please make sure the user has a local user profile on the computer. The connection will be closed.

please hurry up, I need to deploy this application as fast as possible

thank

 


Damn this (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

  

 

Well my problem is this error message 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)"

 

but :

 

-can't connect to SqlServer Express 2005 on my network server from my application while ITS RUNNING. What I mean is that when I use Server Explorer Window on VS2008 every thing is fine (I can even insert and modify data from server explorer), in fact, when I use Datatables and I choose to preview data through TableAdapters (Design Time) I get data, and also can run the queries from there directly to the data base, but when I'm debbugin the application I get this error.

 

-when I run Sql Server Management Studio, its also fine, even though I can't see the Sql instance on the server (or any of my partners machine) when I try to browse them. But if I type the server path (servername\instancename) everything is OK.

 

-I know the problem is not the connection string 'cause mya partners nd I use the sa

Network Error (tcp_error) A communication error occurred: "Connection refused"

  

I trying to execute my C# application from Visual Studio 2005 on a server that I'm remoted into.  I'm getting this error:

Network Error (tcp_error)

 

A communication error occurred: "Connection refused"

 

The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

 

 I can accsss the internet from the remote connection and I am not seeing this error anywhere else.  Does anyone know what might be causing this?  Thanks forany help.

SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

  

Hi

I am receiving an intermittent error as described in the thread title. I have checked several other threads and the commons solutions seem to be...

check the SQL browser service is running

check the spelling of the instance name

check that the correct UDP port is open on the firewall

All of the above are ok in my case but where my case differs is that the error is intermittent - restarting the server solves the problem but sooner or later, it reocurrs. This specificaly relates to an asp.net application - even when I start getting the error, the web app runs fine over the network but running it in debug or testing / creating connection strings gives error 26. I am all out of ideas with this and it's really not convenient to shut down the server in the middle of a working day. I intended to include the full error text at the end of this question but in the time it has taken me to type this, it has started working again (what the ____!!??!). I am running SQL Server 2008 Express with Visual Studio 2010. Any help would be greatly appreciated.

Regards

Steve

 Update: full error text below...

Server Error in '/' Application.
----------------------------------------------------------

A connection was successfully established with the server, but then an error occurred during the log

  

Having encountered this error and not seeing a good answer on this (very old) question, I wrote a blog entry that describes an easy fix. It does involve candy and/or roses though.

 

"A connection was successfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)"

 

http://betav.com/blog/billva/2008/11/solution-forcibly-closed-sql-s.html#more


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