PRB: Visual Basic DisableAsync Fails w/ MASJT200.DLL (132244)


The information in this article applies to:

  • Microsoft Open Database Connectivity 2.0
This article was previously published under Q132244

SYMPTOMS

When you have both the Visual Basic (VB) compatibility layer and the Microsoft ODBC Desktop Database Drivers installed, a VB application (EXE) always runs in asynchronous query execution mode, no matter if DisableAsync is set to one or zero in the application's initialization file(<app> .INI).

WORKAROUND

Install the Microsoft Access Service Pack, which upgrades the Jet Engine (MSAJT200.DLL) to version 2.50.1606.

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

122927 WX1124: Microsoft Access Version 2.0 Service Pack

A VB application will always run in synchronous query execution mode with this service pack installed.

MORE INFORMATION

A VB application, which accesses ODBC data sources via Data Access Objects, can be forced into synchronous query execution mode by specifying the following in its .INI file: 
   [ODBC]
   DisableAsync=1
By default, DisableAsync is set to zero.

When the VB compatibility layer is installed, the Jet Engine is upgraded from version 1.0 to version 2.0. If the Microsoft ODBC Desktop Database Drivers are then installed, the Jet Engine (MSAJT200.DLL) will be upgraded to version 2.50.1117, which forces a VB application into asynchronous query execution mode forever.
Modification Type:MajorLast Reviewed:6/12/2001
Keywords:kbprb KB132244
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