FIX: Access Violation with SQLConfigDatasource & Oracle Driver

• Microsoft ODBC Driver for Oracle, version 1.0 (Build 2.06325)

SYMPTOMS

When you attempt to create an ODBC data source with the SQLConfigDatasource API and the Microsoft ODBC Driver for Oracle version 1.0 (Msorcl10.dll), you get one of error messages listed below.

On Windows 95:

   <APPLICATION.EXE> has caused an invalid page fault in module
   MSORCL10.DLL at 0137:61016bae.

   The instruction at "0x61016bae" referenced memory at "0x00000000".  The
   memory could not be "read".

CAUSE

This is a known bug in the Microsoft ODBC Driver for Oracle, version 1.0. SQLConfigDatasource fails when provided with any invalid attribute string name/value pair.

RESOLUTION

Use only the proper ODBC data source attribute string values found in the Microsoft Knowledge Base article listed in the REFERENCES section or get the updated Oracle ODBC driver version 2.0 that ignores invalid attribute strings.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in the Microsoft ODBC for Oracle driver, version 2.0.

MORE INFORMATION

Steps to Reproduce Behavior

Run the following sample code to reproduce the error:

   // START OF SAMPLE CODE
   #include <windows.h>
   #include <odbcinst.h>
   #include <stdio.h>

   void main()
   {
      SQLConfigDataSource( NULL,
                           ODBC_ADD_DSN,
                           "Microsoft ODBC Driver for Oracle",
                           "DSN=MSORCL10_DSN\0"     // This is valid.
                           "BOGUS=Yada-Yada-Yada\0" // This is invalid.
                          );
   }
   // END OF SAMPLE CODE

REFERENCES

For additional information, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q179236
   TITLE     : INFO: Using SQLConfigDatasource with MS Oracle ODBC Driver