SQLWriter Error: Sysdatabases In SQL Server Instance Xxx Is Empty

Apr 5, 2007

Hi all,

Have every night the following error in eventlog:



Event Type: Error
Event Source: SQLWRITER
Event Category: None
Event ID: 24581
Date: 05.04.2007
Time: 03:01:35
User: N/A
Computer: H0xxxx
Description:
Sqllib error: sysdatabases in SQL server instance C0xxxx is empty.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 51 4c 53 4e 41 50 43 SQLSNAPC
0008: 32 34 35 35 00 00 00 00 2455....
0010: 53 51 4c 53 4e 41 50 43 SQLSNAPC
0018: 32 34 31 39 00 00 00 00 2419....


Any help is appreciated.

TIA

acki

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Jul 9, 2007

I'm trying to re-install SQL 2005 Express download version. I most have deleted something that I shouldn't and now I'm getting that SQLWriter.msi missing error. All I can find in the Microsoft site is how to fix it with the CD version. How do I fix this with the download version?

Best;

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Yesterday, literally I was banging my head to the wall, kept getting this error:

A Connection could not be established with the information provided. Hit OK to change your connection settings.
Invalid object name 'sysdatabases'.

I uninstall and re-install back the reporting services couple times and I kept getting the same error.
I have 2 instances of SQL Server on the same Server:


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Apr 3, 2007

This has worked fine for weeks, and months.

I'm running Vista Ultimate. SQL 2005 is set as my Default instance, and SQL2000 is set as (local)SQL2000.

Today, actually half way through today, I restarted my computer after installing Photoshop Updates.

Upon getting my computer back up and running, I cannot access SQL2000 from any website on my computer, nor can I access it from SQL2005 Management Stdio. I CAN access it from Enterprise Manager (SQL2000 tool).

Whenever I run an web app that connects to it I get this error:


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)

Now I usually get these when ASP.NET can't point to the right spot, but in this case I'm pointing exactly where I need to go. Any thoughts?

--Edit

I should also add my password got changed a few days ago on our Domain. This was the first time restarting after the PW change.

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Jun 5, 2007

I've installed SQL2005 on a server already running SQL2K on my laptop. SQL2K is the default instance, so I'm trying to connect to SQL2005 using MYSERVERSQL2005 as the instance.

The steps that I've taken are to apply SP2 and enable remote connections (TCP & Named pipes). I've also made sure the SQL Server Browser service is running and enabled.

The error message that I get via SQL2005 client tools is "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)"

I dont understand as to why i am unable to connect to 2005.

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Error: 26 - Error Locating Server/Instance Specified - (My Hosting Company Says It's In My Connection String) NOT!

May 24, 2007

Hi All...



I am trying to move my site (incomplete) for testing and I am finding that the Db connection process to be

the most difficult, well back to my problem. I can't seem to get past this error and am frustrated with overall

connectivity problems. Please help!!!



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


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)

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: 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)

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): 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)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +735123
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Connect(Boolean& useFailoverPartner, Boolean& failoverDemandDone, String host, String failoverPartner, String protocol, SqlInternalConnectionTds connHandler, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject, Boolean aliasLookup) +820
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System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170
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System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210





Now you all must admit that, if your somewhat new to this databasing, It's a ***.



The source for my application is Visual Web Designer 2005 Express

It is an ASP.Net driven site with membership roles and all the good stuff.

the latest theory is that I need to change the provider config in the web.config file from AspNetSqlProvider

to something else. Most of my complications and frustrations come from GoDaddy and no access to the

shared server (understandibly).



I hope I gave enough info for help and not too much..



Dave



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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
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All aspects of my website work as expected when previewed in the browser locally. It appears that I successfully published the website to my hosting company server.After successfully accessing the login page from a hyperlink on the homepage, I attempt to login and receive the following error: Please advise.
Server Error in '/' Application.


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)
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Line 2028:
Line 2029: If sqlConnection.State = Data.ConnectionState.Closed Then sqlConnection.Open()
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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
 

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

Jul 13, 2007



Hi,



I have been stuck up with this error.

I am using SQL Srver express edition with asp.net 2.0 on windows XP SP2.

When I open the SQL Management studio and execute queries it works fine.

When I exute query in command prompt using SQLCMD -E -S ServernameInstance

It conect with database and I can freely execute queries in command prompt.

I have also tried to connect with Classical ASP 3.0 It also works fine. No error



I have made all changes that u specified in ur article.



But When I try to connect with asp.net. It gives me error.



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


Same files are workign fine in my office with SQL Server 2005 enterprise edition and ASp.net 2.0. on Windows server 2003. I do not get this error. But at home I am facing this problem again and again.

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Error: 26 Error Locating The Server/instance Specified (.NET SQLClient Data Provider)

Jun 8, 2007

All,



One of our developers decided to load 2K5 client tools on to their laptop. They cannot connect getting the following error:



....Error: 26 Error Locating the Server/instance specified (.NET SQLClient Data Provider)....



1.) Allowing remote connections IS enabled.

2.) SQL Browser Service is ON

3.) Windows Firewall is NOT running

4.) All protocols (except VIA) are enabled



Others at this office, including myself, can connect fine in Management Studio. Only this one developer cannot.



Any thoughts and/or help would be much appreciated. I think that the problem has something to do with the first sentance above but I am not positive.



Thanks in advance,

DBA Ben

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When Asynchronous Processing=true, I Get Provider: SQL Network Interfaces, Error: 26 - Error Locating Server/Instance Specified

Sep 26, 2007

This problem happens on this particular machine and doesn't happen on other machines that I have. And I think this problem belongs to this forum. Because the problem is triggered by a special setting in the connection string.
I followed the steps of threads including Xinwei Hong's instruction for fixing this error(26) but has no luck.

The problem occurs when I call SqlConnection.Open().

I am using window xp, sql2000. the named instance is on local machine, my connection string is like

"Data Source=MSL-1417762\SQL2000;Initial Catalog=PopulateForeignKeys_MSL_1417762_2_5984;Integrated Security=True;Pooling=False;Asynchronous Processing=true"

Whenever I change Asynchronous Processing=true into Asynchronous Processing=false, the problem is gone.

This problem also occurs when I use Visual Studio - Server Explorer - Add Connection dialog - Advanced button - Advanced Properties window where you can set Asynchronous Processing property to true.

Can you please help?

Thanks,

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

Jun 12, 2006

I'm having an issue when moving my site from my laptop that's running VWD Express and SQL 2005 Express to my production Windows 2003 server running SQL 2005 Standard.  The site is a portal site that authenticates to my Active Directory, and uses roles bases in SQL.  I can open the site on the laptop and everything works fine and I have no problems.  Once I copy the site to the production server and try to access the site, I get the login page fine and try to login.  The default page never opens so I'm thinking this must be some type of roles issue.  Do I need to do anything with my ASPNETDB.MDF file to make it work with SQL 2005 Standard instead of Express version?  I've already made sure that the SQL server is accepting remote connections...what other things do I need to do to my SQL server to ensure proper functioning?  Any particular security user I need to be running particular services under?  Thanks in advance...
MikeD

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

Jan 30, 2008

Hi, I have installed SQL Server 2005 and Visual Studio 2005 in my machine.
I got an error when I tried an example.

"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)" .

I followed many advice online and did the following but still wrong.


Enable networking protocols during managment configuation.

add port 1343 on firewall or turn off the firewall.

make changes in web.confige as



Code Snippet
<?xml version="1.0"?>
<!--
Note: As an alternative to hand editing this file you can use the
web admin tool to configure settings for your application. Use
the Website->Asp.Net Configuration option in Visual Studio.
A full list of settings and comments can be found in
machine.config.comments usually located in
WindowsMicrosoft.NetFrameworkv2.xConfig
-->
<configuration>
<appSettings/>
<connectionStrings>
<remove name="LocalSqlServer"/>
<add name="LocalSqlServer" connectionString="Data Source=localhostand;Initial Catalog=Players;User ID=test;Password=test"/>
<add name="SqlConnectionString" connectionString="Data Source=localhostand;Initial Catalog=Players;User ID=test;Password=test"/>
<add name="OdbcConnectionString" connectionString="Driver={MySQL ODBC 3.51 Driver}; server=localhost;database=players;uid=test;pwd=test" />
<add name="OleDbConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:andplayers.mdb" />
</connectionStrings>
<system.web>
<!--
Set compilation debug="true" to insert debugging
symbols into the compiled page. Because this
affects performance, set this value to true only
during development.
-->
<compilation debug="true"/>
<!--
The <authentication> section enables configuration
of the security authentication mode used by
ASP.NET to identify an incoming user.
-->
<authentication mode="Windows"/>
<!--
The <customErrors> section enables configuration
of what to do if/when an unhandled error occurs
during the execution of a request. Specifically,
it enables developers to configure html error pages
to be displayed in place of a error stack trace.
<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<error statusCode="403" redirect="NoAccess.htm" />
<error statusCode="404" redirect="FileNotFound.htm" />
</customErrors>
-->
</system.web>
</configuration>




Thanks for your help.

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

Jun 12, 2007

I am trying to use the visual studio for database professionals. I get the error 26 when I try to import a schema from an existing database. I am using a database from my local instance. I test the connection and the test succeeds. What is causing the error 26?

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Problem With One Application With The Error:26 - Error Locating Server/instance Specified

Nov 9, 2007



Hello all!

I have been researching this problem on the net. I have everything setup, here is the wierd part. I did a test windows application, and that application connects into my database just fine. I have SQL DEV 2005, everything is on my laptop. I have websites that I have wrote that connects fine.

I have application that give me this error. Now the only thing is that I wrote this windows app on a diffrent machine, with a diffrent SQL 2005 server. I had to move everything on my laptop, so I can finish on site at the clients place. So I grabbed the project, copied it over, and opened it on my laptop. No problems. I created a new database, scripted everything from the other server, and ran those scripts on my laptop to create the tables, SP etc.

Now my test application I created on my laptop, I can connect to the databse just fine with this string.

<add name="TestDataGrid.My.MySettings.TestConnectionString"

connectionString="Data Source=MKE01-2N92461;Initial Catalog=TestDB;Integrated Security=True"

providerName="System.Data.SqlClient" />

I can also connect to the database that I brought over from the other server. Could there be somthing with the Datasets, or something like that?
Any Thoughts?

TIA!

Rudy

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Error Message: Failed To Generate A User Instance Of SQL Server. Only An Integrated Connection Can Generate A User Instance

Mar 3, 2008

 Hello everybody,I was configuring a SqlDataSource control using SQL Authentication mode.I first added a database file (testdb.mdf) through Solution Explorer-Add New Items. Then through Database Explorer I created a table named "info"Then while configuring  the SqlDataSource control I used the SQL Authentication mode and attached the "testdb.mdf" database file.Test Connection showed success. But when I hit the Ok button of the wizard it displayed the following error message:Failed to generate a user instance of SQL Server. Only an integrated connection can generate a user instance.While configuring the  SqlDataSource control I clicked "New Connection". Under Data Source section I tried both Microsoft SQL Server and Microsoft SQL Server Database File. And in both the cases I attached a databese file(testdb.mdf).          Plz enlighten me on this.Thanks and Regards,Sankar. 

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Still Unresolved - Error: 26 - Error Locating Server/Instance Specified

Jan 11, 2008

I'm still having this problem after hours of research. I've tried changing my connection string, changing the name of my instance, reconfiguring SQL Express, and even went so far as to take my firewall down completely when adding Sql Browser and opening port 1434 to the exceptions list didn't work.

I've read the blog at http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx by Xinwei Hong - it seemed to be a nice approach to this problem and has obviously helped numerous people, but sorry Xinwei, it's not working for me.

I get the following error message when I try to use the Login control (out-of-the-box):

Server Error in '/' Application.
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)

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 specifies a local Sql Server Express instance using a database location within the applications App_Data directory. The provider attempted to automatically create the application services database because the provider determined that the database does not exist. The following configuration requirements are necessary to successfully check for existence of the application services database and automatically create the application services database:


If the applications App_Data directory does not already exist, the web server account must have read and write access to the applications directory. This is necessary because the web server account will automatically create the App_Data directory if it does not already exist.
If the applications App_Data directory already exists, the web server account only requires read and write access to the applications App_Data directory. This is necessary because the web server account will attempt to verify that the Sql Server Express database already exists within the applications App_Data directory. Revoking read access on the App_Data directory from the web server account will prevent the provider from correctly determining if the Sql Server Express database already exists. This will cause an error when the provider attempts to create a duplicate of an already existing database. Write access is required because the web server accounts credentials are used when creating the new database.
Sql Server Express must be installed on the machine.
The process identity for the web server account must have a local user profile. See the readme document for details on how to create a local user profile for both machine and domain accounts.

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: (Edited to preserve page formatting)
[SqlException (0x80131904): 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)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +800131
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +186
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +737554
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +114
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +421
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +181
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +173
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +133
System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) +27
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +47
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +68

[HttpException (0x80004005): Unable to connect to SQL Server database.]
System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +124
System.Web.Management.SqlServices.SetupApplicationServices(String server, String user, String password, Boolean trusted, String connectionString, String database, String dbFileName, SqlFeatures features, Boolean install) +86
System.Web.Management.SqlServices.Install(String database, String dbFileName, String connectionString) +25
System.Web.DataAccess.SqlConnectionHelper.CreateMdfFile(String fullFileName, String dataDir, String connectionString) +397


Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433



When I click the [>] arrow in the upper-right corner of the login control and choose "Administer Website", click the "Select a single provider for all site management data" only one provider is listed: AspNetSqlProvider (default, selected). When I click the "Test" link, it hesitates for a while, then finally gives me the following screen:


Provider Management
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.

I've verified (reverified, and re-reverified - to the point of performing several copy-paste functions from SQL Server Management Studio Express) the server and instance names. They are correct. I can connect to the databases through the Server Management Studio, but not through my websites.

I've tried using ServerInstance as well as Server\Instance, Server/Instance, and ServerInstance, port# - ALL to no avail.

This is all being done through localhost, so I don't see that this should be a DNS issue. I've verified that my SQL Server Browser service is running (and have restarted it after various configuration changes). I've added Sql Server Browser to the list of exceptions as well as opened up port 1433 and 1434 on my firewall. I've even tried taking my firewall down completely to run tests. And still I get that error.

[Edit: Accidentally posted prematurely]

Continuing on... my CURRENT connection string is as follows:


<connectionStrings>

<add name="pnpConnection" connectionString="Data Source=GLORIALOCALDEV,1433;Initial Catalog=pnpdb;Integrated Security=True" providerName="System.Data.SqlClient"/>
</connectionStrings>


I would like to be pulling my hair out right now, but I've just about ripped it all out, so I'm running short on that as of yet. Does anyone have a solution for this problem? There may be something larger going on, since when I use the Login Control and set the "VisibleWhenLoggedIn" property to "False", it hides the control even when there's noone logged in (and nothing in the aspnetdb database.


TIA,
Jason Satterfield

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Error: 26 - Error Locating Server/Instance Specified

Jan 24, 2007

HiI have setup the membership schema on a hosted server using the asp_regsql.exe tool fine.  I have setup roles/memberships using the website adminitraion tool and i have checked that its all being entered into my hosted MSSQL server.  I have also setup my web.config file to point to the hosted server and all seems to be connecting ok! When i test/debug my project locally (using the F5 key), my login box works fine!How ever, i have now uploaded my project to my hosted server.  If i put an incorrect login, then i get the usual 'Your login attempt was not successful. Please try again.' - So i know its connecting to the right database.  How ever, when i enter the correct login details, i get the following error: 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) ...if its connecting to the same database fine when i test it from my local machine, why will it not work when i test it from my hosted server? thanks 

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Error:26 - Error Locating Server/Instance Specified

Aug 30, 2007

 I'm having a real strange experience when grabbing the connectionstring property from the web.config.  Let me explain: The following code works fine:=========================================================================  SqlConnection connection = new SqlConnection("server=dbserver;database=dbdatabase;user id=userID;password=Password");  However, the following code generates an error - "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)"========================================================================= string strDbConnection = ConfigurationManager.ConnectionStrings["dbConnection"].ConnectionString; SqlConnection connection = new SqlConnection(strDbConnection);  Web.Config Code===============================<connectionStrings>    <add name="dbConnection" connectionString="server=dbserver;database=dbdatabase;user id=userID;password=Password" providerName="System.Data.SqlClient"/>  </connectionStrings>   I have no idea why this is generating an error when I just simply assign the connectionstring property from the web.config to a local variable.  I mean, it works when I use the connection string hard coded. Does anyone know why this could be happening?  Thanks.

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Error: 26 - Error Locating Server/Instance Specified

Mar 7, 2008

hi there;well i have a problem after i deployed my wep application to the server(hosting). the point here that the application (as i and the hosting company think) is trying to connect to local sql server!. there is no connection string that is pointed to local sql serevr. i used a dataset.xsd on the application for the tables on database, any configuration on the tables adapters shows that they are connected to remote sql server and there is nothing wrong. when i debug the application locally using the remote sql server, the application runs well and retrieve data from the hosting server. but when i deploy the application on server i get the this error;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) [SqlException (0x80131904): 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)] System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +800131 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +186 System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +737554 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +114 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +421 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +181 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +173 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +133 System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) +27 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +47 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105 System.Data.SqlClient.SqlConnection.Open() +111 System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +68[HttpException (0x80004005): Unable to connect to SQL Server database.] System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +124 System.Web.Management.SqlServices.SetupApplicationServices(String server, String user, String password, Boolean trusted, String connectionString, String database, String dbFileName, SqlFeatures features, Boolean install) +86 System.Web.Management.SqlServices.Install(String database, String dbFileName, String connectionString) +25 System.Web.DataAccess.SqlConnectionHelper.CreateMdfFile(String fullFileName, String dataDir, String connectionString) +397 so i have no idea what the problem it could be but i've a little doubts that the problem could be from the dataset.xsd!!!thanks in adavance. 

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Error: 26 - Error Locating Server/Instance Specified

May 18, 2008

I have been fixing this error many days but there is no result. The ways I tried so many that I can't remember.OS: Vista 64bit SP1.Visual studio 2008Sql server 2005all firewall are off. One key point, my app run very well in windows server 2003 pc. Error Detail 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)
body {font-family:"Verdana";font-weight:normal;font-size: .7em;color:black;}
p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
pre {font-family:"Lucida Console";font-size: .9em}
.marker {font-weight: bold; color: black;text-decoration: none;}
.version {color: gray;}
.error {margin-bottom: 10px;}
.expandable { text-decoration:underline; font-weight:bold; color:navy; cursor:hand; }

Server Error in '/Demo on lionking-hp' Application.


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) 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: 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)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): 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)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +800131
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +186
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +737554
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +114
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +381
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +181
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +173
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +133
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +30
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +494
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105
System.Data.SqlClient.SqlConnection.Open() +111
System.Web.DataAccess.SqlConnectionHolder.Open(HttpContext context, Boolean revertImpersonate) +84
System.Web.DataAccess.SqlConnectionHelper.GetConnection(String connectionString, Boolean revertImpersonation) +197
System.Web.UI.WebControls.WebParts.SqlPersonalizationProvider.GetConnectionHolder() +16
System.Web.UI.WebControls.WebParts.SqlPersonalizationProvider.LoadPersonalizationBlobs(WebPartManager webPartManager, String path, String userName, Byte[]& sharedDataBlob, Byte[]& userDataBlob) +195
System.Web.UI.WebControls.WebParts.PersonalizationProvider.LoadPersonalizationState(WebPartManager webPartManager, Boolean ignoreCurrentUser) +95
System.Web.UI.WebControls.WebParts.WebPartPersonalization.Load() +105
System.Web.UI.WebControls.WebParts.WebPartManager.OnInit(EventArgs e) +497
System.Web.UI.Control.InitRecursive(Control namingContainer) +321
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Control.InitRecursive(Control namingContainer) +198
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +834


Version Information: Microsoft .NET Framework Version:2.0.50727.1434;
ASP.NET Version:2.0.50727.1434  

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Error: 26 - Error Locating Server/Instance Specified

Sep 24, 2007

Hi
I seem to have a quite common problem. I€™ve search forums and blogs both on Microsoft and outside but even though I find many people that have similar problems. After migrating from XP to Vista I can€™t seem to solve the problem. I can€™t seem to get by Windows Form application based on framework 2.0 to connect to my locally stored SQL Server 2005 Express database. The application has not changed and the environment (apart from the operating system) hasn€™t changed either. No matter what I try the problem persists.
The thing that confuses me the most is that I within Visual Studio 2005 can preview data in the data sources tab. In my understanding, both uses the same connection string but I find it possible that the user might differ but I don€™t understand why is should.
From my point of view (and might of course be wrong) these things should not be the source of the problem:
· The firewall, since that has been turned off
· The connection string, since that actually work when performing a preview data
· The remote settings, since the server and the client is on the same machine
· The SQL Browser, since I tried connecting using a TCP/IP connection with the same results
Possible problems:
· SQL User access, if the user when performing preview is for some reason not the same as when the application runs
· A Vista problem of some sort
I€™ve read basically everything I€™ve been able to find on the issue but even though the symptoms fit the solutions don€™t solve the problem. This problem has been haunting me for weeks now and I€™m really out of ideas?
Here is a listing of things I€™ve tried without success:
· The remote settings in the SQL Server Surface Area Configuration has been turned on even though I don€™t understand to what end since the server and client in this case reside on the same physical machine. However this did allow me to try connections using TCP/IP. I did restart both the services and the computer to be sure.
· Connections using TCP/IP where the connection string supply contain tcp:<ip>,<port>
· Different exceptions in the firewall, both on port level (for UDP and TCP) and on application level (sqlserver.exe and sqlbrowser.exe). The dynamic port setting has was changed during this test to a static port setting.
· A number of variants of the connection strings (e.g. using ./sqlexpress instead of <machine_name>/sqlexpress)
· All the error logs (Event logs, SQL ERRORLOGS and firewall log while it was turned on) have been checked and the only reoccurring message is a warning message from the SQL Browser: The configuration of the AdminConnectionTCP protocol in the SQL instance SQLEXPRESS is not valid.
The server and the client reside on the same machine.
[1] These are the specific CLIENT side settings:
1. Connection string: Data Source=.SQLEXPRESS;Initial Catalog=Products;Integrated Security=True
2. Full error 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
I can ping the server
3. Client and server reside on the same machine
4. Yes I can ping the machine
5. Haven€™t tried
6. SQL Server Management Studio Express works, using Visual Studio 2005 works but the applications built by VS2005 doesn€™t work.
7. N/A (Client and server reside on the same machine)
8.
9. No alias used
10. No encryption used.
[2] These are the specific SERVER side settings:
1. SQL Server 2005 Express SP2
2. Se above
3. Protocols enabled Shared Memory, TCPIP and Named Pipes
4. Yes, there are not errors in the ERRORLOG
5. Yes the SQL Browser is enabled and active and must work at least in some aspects since the preview data works
6. Currently running as default: Network Service
7. The firewall is turned off entirely
8. The firewall is turned off entirely
[2a] Visual Studio 2005 Team Edition for Developers
[3]
1. Vista Business
2. No antivirus installed at this point.
Hope for some help.
Regards Malin

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Error: 26 - Error Locating Server/Instance Specified

Jul 28, 2006

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) 

Does anyone know what could be wrong ?

 

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SQL Server Instance Error

Dec 8, 2006

Out of nowhere, I suddenly start getting the following error after over two weeks of successful operation (SQL Server Express 2005). Not sure what the "automatically create" stuff is about.
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)
SQLExpress database file auto-creation error: The connection string specifies a local Sql Server Express instance using a database location within the applications App_Data directory. The provider attempted to automatically create the application services database because the provider determined that the database does not exist. The following configuration requirements are necessary to successfully check for existence of the application services database and automatically create the application services database:If the applications App_Data directory does not already exist, the web server account must have read and write access to the applications directory. This is necessary because the web server account will automatically create the App_Data directory if it does not already exist.
If the applications App_Data directory already exists, the web server account only requires read and write access to the applications App_Data directory. This is necessary because the web server account will attempt to verify that the Sql Server Express database already exists within the applications App_Data directory. Revoking read access on the App_Data directory from the web server account will prevent the provider from correctly determining if the Sql Server Express database already exists. This will cause an error when the provider attempts to create a duplicate of an already existing database. Write access is required because the web server accounts credentials are used when creating the new database.
Sql Server Express must be installed on the machine.
The process identity for the web server account must have a local user profile. See the readme document for details on how to create a local user profile for both machine and domain accounts.
Lines from web.config:
<appSettings><add key="conn" value="Integrated Security=True;Initial Catalog=t;Data Source=b " /></appSettings>
How the connection string is referenced:
Private objCmd As SqlCommandPrivate strConn As New SqlConnection(ConfigurationManager.AppSettings("conn"))...objCmd = New SqlCommand("select FName from tblClients", strConn)strConn.Open()

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26 - Error Locating Server/Instance Specified

Nov 10, 2006

Hi,
 Have installed the club site starter kit on my pc and all it works well locally.  I've used visual studio to publish my site to my third party webhost.  Ive created the DB on their server and altered the connection string to:-
<connectionStrings>
<!--<add name="ClubSiteDB" connectionString="Server=xx.xx.xx.xx;Database=somedatabasename;User ID=user;Password=Password;Trusted_Connection=False" providerName="System.Data.SqlClient"/>-->
</connectionStrings>
Now its on the webhosts server i get a 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified).
 This occurs when im trying to login in or register.
 Can any one help.

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