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Failed to generate a user instance of SQL Server

    Question

  • I am trying to create an SQLExpress database file (mdf) in VS2005 but I get the following error:

    "Failed to generate a user instance of SQL Server due to a failure in making a connection to the user interface. The connection will be closed.”

    I also get this same error if I try to open an existing database from the VS samples.

    Any Ideas?

    Thanks,
    Dave T
    Thursday, July 28, 2005 7:58 PM

Answers

  • Could you please provide build numbers of VS and SQL Server?

    Also, have you tried connecting to SQL Server instance using sqlcmd command line utility (sqlcmd /? for options). If that fails, please include full command line and the error message you get.

    Most likely reason for the connection to fail are incorrect connection string, lack of permissions (or application/database server running under different accounts) and not running instance.

    Try verifying each of the steps in the error message provided.

    Thank you,
    Boris.

    Wednesday, August 17, 2005 4:40 PM

All replies

  • I am having a similar problem.

    I have installed the VS2005 TS CTP (Beta 2).  I am walking through the tutorial at http://beta.asp.net/guidedtour2/.  When I get to the point in the tutorial where you create the authentication/authorization database (http://beta.asp.net/guidedtour2/s27.aspx), I go to the security tab of the web site admin tool, and get this:

    "There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store.

    The following message may help in diagnosing the problem: Unable to connect to SQL Server database."

    I then click on the "Choose Data Store" button, which takes me to the "Provider" tab.  At this point I click on the link to choose a single provider.  On the next page, I select "AspNetSqlProvider" (the only option available) and click on the "Test" link.

    At this point, I get an error page.  Contents pasted below.  I have checked all of the permissions mentioned in this error page, and am at a complete loss as to what to try next so that I can create the database and continue on.

     

    Server Error in '/asp.netwebadminfiles' Application.

    Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.

    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:

    1. 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.
    2. If the applications App_Data directory already exists, the web server account only requires read 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. Note that 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 SQL Server Express attempts to create a duplicate of an already existing database.
    3. SQL Server Express must be installed on the machine.
    4. If the application services database does not already exist, the SQL Server Express service account must have read and write access to the applications App_Data directory. This is necessary because the SQL Server Express service account will create the application services database.
    5. The web server account used to connect to SQL Server Express must have rights to create a new database.
      1. When using the local web server(Cassini) installed with Visual Studio, the logged-in user needs the dbcreator privilege in the appropriate SQL Server Express instance.
      2. When using IIS, the process account needs the dbcreator privilege in the appropriate SQL Server Express instance. Only consider granting a process account dbcreator privilege on secure development machines. Do not grant the dbcreator privilege on production machines without fully investigating and understanding the security ramifications of running a production web server with the dbcreator privilege. The process account requiring dbcreator privilege varies depending on operating system platform and ASP.NET configuration settings:
        • For IIS5, and IIS6 running in IIS5 isolation mode, the default web server account is the local ASPNET machine account.
        • For IIS6 native mode, the default web server account is NETWORK SERVICE.
        • If application impersonation is enabled, then the application impersonation account requires the dbcreator privilege.
        • If an explicit account was specified for the web server process (either in the <processModel> element for IIS5 and IIS5 isolation mode, or the application pool account on IIS6), then the explicit account requires the dbcreator privilege.


    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): Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.]
    System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +684883
    System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +207
    System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1751
    System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +32
    System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +601
    System.Data.SqlClient.SqlInternalConnectionTds..ctor(SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +159
    System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +108
    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) +67



    [HttpException (0x80004005): Unable to connect to SQL Server database.]
    System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +123
    System.Web.Management.SqlServices.SetupApplicationServices(String server, String user, String password, Boolean trusted, String connectionString, String database, String dbFileName, SqlFeatures features, Boolean install) +90
    System.Web.DataAccess.SqlConnectionHelper.EnsureValidMdfFile(String fullFileName, String dataDir, String connectionString) +345


    Version Information: Microsoft .NET Framework Version:2.0.50215.44; ASP.NET Version:2.0.50215.44
    Friday, July 29, 2005 7:05 PM
  • Could you please provide build numbers of VS and SQL Server?

    Also, have you tried connecting to SQL Server instance using sqlcmd command line utility (sqlcmd /? for options). If that fails, please include full command line and the error message you get.

    Most likely reason for the connection to fail are incorrect connection string, lack of permissions (or application/database server running under different accounts) and not running instance.

    Try verifying each of the steps in the error message provided.

    Thank you,
    Boris.

    Wednesday, August 17, 2005 4:40 PM
  • I'm getting the same error message when I try and connect to the site from a different computer but it works fine on my test machine.  I get an error message "Your Sql Server installation is either corrupt or has been tampered with (Could not open sqlevn70.rll)."

    Thanks for any help you can give.
    Wyatt 
    Thursday, August 18, 2005 1:12 AM
  • In arbitrary order:

    Are you able to connect on the same machine to an instance?
    What is the version you are running?
    What are you connecting with when you get this error message?
    Have you tried restarting the sql server and the machine?
    Have you checked permissions?
    Did it ever work?

    Saturday, August 20, 2005 2:01 AM
  • Are you able to connect on the same machine to an instance? I do not know how to connect to a database file through sql server express manager but I can open it through the vs2005 ide.
    What is the version you are running? sql server express beta 2.
    What are you connecting with when you get this error message? When I run the site through the vs2005 ide I don't get the error but if I run the site through iis I get the error message.
    Have you tried restarting the sql server and the machine?  Yes
    Have you checked permissions?  I checked to make sure that aspNet (i'm running on xp) has write premisions to the database (Personal.mdf) file.
    Did it ever work?  Only through the VS2005 IDE.

    Thanks.

    Saturday, August 20, 2005 3:29 PM
  • Go to server connections tab in VS 2005 or Database connections VWD 2005. Right click the MDF file. Click modify connection. On the Advanced Tab of the modify connection, scroll down and look for 'User Instance' property. Set to 'False'.

    Then test connection; should work fine.Idea
    Sunday, August 21, 2005 11:51 AM
  • Thanks!  That makes sense.

    Monday, August 22, 2005 11:36 AM
  • I still get the error (when trying to browse the web page though ie) even though the database now shows up in Sql Server Express Manager.
    Monday, August 22, 2005 1:13 PM
  • I have the same problem.

    I installed SQL 2005 Server, I don't have a SQL Express (While installing VS2005 I skipped SQL Express)

    Do I need to change connection strings? Where?


    Saturday, September 03, 2005 12:01 AM
  • Yep, same for me - the database now at least appears in the 'Data Connections' list of the Server Explorer pane, but when I try and run any of the 'Starter Pack' apps, I get the same message: 'There was a problem loading data: Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.'

    Helpful? Not!

    Perhaps VS would work better with a MySQL database . . . ?
    Monday, September 12, 2005 1:14 PM
  • I'm having a similar problem, my question though, in a walkthrough to use the login control it says the default is an access one that is not even listed as an option as a Provider, and not the sql one, indeed the sql version it lists isn't even the provider listed in the asp.net configuration setup. Because I'm not very proficient with SQL yet, but am fairly good with Access I wanted to build my first applications using Access rather than SQL. I am assuming that this is something that changed from beta 1 to 2?
    Whether it is or not, is there a way for me to use the asp.net configuration and user management tools with an Access backend? If there isn't, how do I migrate this database from my development system to my production server? I am quite at a loss on using SQL so detailed help here would be greatly appreciated.

    Jyn
    Monday, September 12, 2005 9:14 PM
  • I met this problem too.But now I has solved that.
    1.Firstly,do as what factoryman said:Go to server connections tab in VS 2005 or Database connections VWD 2005. Right click the MDF file. Click modify connection. On the Advanced Tab of the modify connection, scroll down and look for 'User Instance' property. Set to 'False'.
    2.After do that,you can view the database stucture in the "Server Explore" view.But if you run your web application,maybe you'll found that the same problem occure.And this time I think you should do:in the web.config file, modify the infomation of the database connection,set "User Instance=False".

    Wednesday, September 14, 2005 6:40 AM
  • Ok, I tried to do that and now it can't connect to the database at all.
    Gives me the message:
    An attempt to attach an auto-named database for file C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\WebSites\BearLodge\App_Data\Files.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

    Trying to do it in the connection I can't even get it to save the setting, and putting it in the web.config it won't load the page, just displays that error. I did some checking and what I've found that says how to fix that error says to put the user instance back to true.
    So... where do I go from here?

    Wednesday, September 14, 2005 4:20 PM
  • Ok got this much figured out, still having other problems, but this part of the problem is fixed. lol
    Thursday, September 15, 2005 5:51 PM
  • I can now create an MDF file after setting 'User Instance' to false but now I cannot move the file using database Xcopy deployment. I think you need to create the file with 'User Instance=true' to enable xcopy. Anyone been able to Xcopy a MDF file after creating it?

    ref:
    http://whidbey.msdn.microsoft.com/library/default.asp?url=/library/en-us/sqlexpressbol/html/6dbebf77-bd15-4163-82cc-6c1ff5e78ab9.asp

    Monday, September 26, 2005 9:03 PM
  • If you are still having problems, please start a new thread.
    Tuesday, September 27, 2005 3:51 PM