PRB: Legacy DB-Library Application May Fail to Connect After You Install SQL Server Client Tools (254341)
The information in this article applies to:
This article was previously published under Q254341 SYMPTOMS
A DB-Library application that worked fine with Microsoft SQL Server 6.5 is unable to connect to Microsoft SQL Server 7.0 after you install the SQL Server 7.0 Client tools. If the client connects by using TCP/IP sockets, the Dbmssocn.dll file, the following error messages might occur:
Microsoft Visual C++ runtime library
Assertion Failed
Program: C;\Windows\MMC.EXE
File: ..\SRC\SQLSSPI.C
DB-Library: Unable to connect: SQL Server is unavailable or does not exist.
General network error. Check your documentation.
Net-Library error 11001: ConnectionOpen (gethostbyname()())
CAUSE
The DB-Library DLL, Ntwdblib.dll, was updated to version 7.00.623 and then installed to the \Winnt\System32 directory or on a Microsoft Windows 95-based computer or Microsoft Windows 98-based computer, the \Windows\System directory, and the application using the sockets Net-Library is attempting to make a trusted connection to the SQL Server through the SSPI API even though a trusted connection was not requested.
WORKAROUND
Replace the Ntwdblib.dll with version 6.50.409 from Microsoft SQL Server 6.5 Service Pack 5a (SP5a).
MORE INFORMATION
A client computer that does not have the Microsoft Windows Network Client installed also fails to connect when you use the TCP/IP sockets Net-Library.
| Modification Type: | Major | Last Reviewed: | 10/16/2002 |
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| Keywords: | kbBug kbprb KB254341 |
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