BUG: Visual Basic 6.0 T-SQL Debugger fails against SQL Server 2000 named instance

View products that this article applies to.

This article was previously published under Q310647

SYMPTOMS

Attempting to use the Visual Basic 6.0 T-SQL Stored Procedure debugger add-in to debug a SQL Server stored procedure on a named instance of SQL Server 2000 fails.

Three error messages occur in the following sequence:

After you select a stored procedure in the add-in, type parameter values (if any), and click Execute, a T-SQL Debugger dialog box appears with the following error message:
A memory error occurred.
Alternately, if you then click Go or Step, the stored procedure skips any breakpoints, and you receive the following error message:
The query could not be debugged due to a problem coordinating events with the server...
On the client computer, the following event is logged in the Windows Application Event Log with a source of VBSDIDB:
An error occurred at ..\Sdiuitrd.cpp(287)
On the client computer, the following event is logged in the Windows Application Event Log with a source of VBSDIDB:
The system cannot find the path specified. , Line=2031, File=..\vbsdicli.cpp
Note You may or may not receive this third error message, depending on the operating system.

The add-in, Visual Basic, and SQL Server do not fail (crash). There are no messages on the server side, neither in the event log nor in the SQL logs.

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CAUSE

The current version of the T-SQL Debugger add-in does not support named instances of SQL Server 2000.

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RESOLUTION

To work around this problem, debug against the default instance of SQL Server, which you can refer to by server name alone.

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STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.

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MORE INFORMATION

Steps to reproduce behavior

Locate or install a named instance of SQL Server 2000. Do not add or use SQL Server 2000 Service Pack 1 because the debugger add-in does not work with Service Pack 1.
From the SQDBG_SS folder on CD #2 of Microsoft Visual Studio or Visual Basic Enterprise Edition, copy SDI.dll to the Binn folder of the named instance (which is C:\Program Files\Microsoft Sql Server\MSSQL$NamedInstance\Binn or similar). Use Regsvr32.exe to register SDI.dll. Note that you cannot use the automated Setup program that is located in SQDBG_SS for this purpose.
Use the ODBC Administrator to create an ODBC data source name (DSN) that points to the Northwind sample database on this named instance of SQL Server 2000. Type the server and instance name in the following format:
ServerName\InstanceName
The connection should test successfully.
Locate or install Visual Studio or Visual Basic Enterprise Edition version 6.0 Service Pack 5. To eliminate other incompatibilities with SQL Server 2000, Service Pack 5 is required. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
272074 (http://support.microsoft.com/kb/272074/ ) FIX: T-SQL Debugger parses SQL Server 2000 return value incorrectly
Open Visual Basic, and load the T-SQL Debugger add-in from the Add-ins menu.
Return to the Add-ins menu, and open the debugger.
On the Settings tab, select the newly created DSN, and type the authentication information.
On the Stored Procedure tab, use the already-displayed CustOrderHist stored procedure, and type ALFKI as the only input parameter value.
Click Execute. The debugging window appears, which is followed by the above-mentioned sequence of errors.