Microsoft KB Archive/129772

= FIX: "Attempt to load required component ODBC32.DLL failed" =

Article ID: 129772

Article Last Modified on 11/21/2006

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APPLIES TO

 Microsoft Foundation Class Library 4.2, when used with:  Microsoft Visual C++ 2.0 Professional Edition

 Microsoft Visual C++ 2.1 

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This article was previously published under Q129772



SYMPTOMS
The following error occurs when trying to access an ODBC data source from a 32-bit application under Win32s:

Attempt to load required component ODBC32.DLL failed.



CAUSE
There are two main causes for this:


 * The ODBC components weren't installed because the ODBC setup program wasn't executed from the WIN32S\ODBC directory of the Visual C++ version 2.0 or 2.1 CD.
 * The \WIN32S\ODBC directory on the Visual C++ version 2.1 CD contains an incorrect version of the ODBC32.DLL file (the thunking driver manager). The incorrect version does not load under Win32s.



RESOLUTION
Ensure that the ODBC setup program from the WIN32S\ODBC directory has been executed.

Additionally, after installing from the Visual C++ version 2.1 CD, you'll need to copy the ODBC3216.DLL file located in the WIN32S\ODBC directory (this is the correct thunking ODBC driver manager for Win32s) to the WINDOWS\SYSTEM directory and rename it to ODBC32.DLL to replace the incorrect ODBC32.DLL.

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STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem was corrected in Microsoft Visual C++, 32-bit Edition, versions 2.2.

Additional query words: 2.00 2.10 3.0 3.00 3.1 3.10

Keywords: kbbug kbdatabase kbfix kbsetup KB129772

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