KB139290 - PRB: 32-Bit Cursor Library Creates Temp Files in Current Dir

SYMPTOMS

The 32-bit ODBC Cursor library (ODBCCR32.DLL) creates temporary files in the current directory from which the application is launched. The 32-bit cursor library creates temporary files of the form CTTXXX.TMP in the current directory of the application. As a result, applications using the cursor library may encounter errors when they switch the current directory in their application while cursors are still active.

For example, while closing the application you might see the error message:

[Microsoft ][ODBC Cursor library] Unable to close file buffer.

32-bit Microsoft Foundation Class (MFC) applications that use snapshots fall into the above class of applications.

WORKAROUND

If feasible, close all open cursors and switch the current directory.

If you are using File Dialogs, monitor the current directory using the Win32 API call GetCurrentDirectory() and reset the path using SetCurrentDirectory().

For example:

   main()
   {
    ..
   GetCurrentDirectory(...);
   ...
     /* open cursors  */ 
   ...
     /* open file dialog */ 
   SetCurrentDirectory(..);
     /* close the cursors */ 
   ..
   }