BUG: Problems with MDAC20.Cab Shipping in VS 6.0 and VB 6.0

ID: Q189671

The information in this article applies to:

Remote Data Service for ADO version 2.0
Microsoft Visual Basic Professional and Enterprise Editions for Windows, version 6.0
Microsoft Visual Studio 6.0

SYMPTOMS

The MDAC20.Cab file was built as a lightweight way to distribute version 2.0 of the RDS and ADOR technologies to a machine without installing all of the MDAC components.

The version of MDAC20.Cab that ships with Visual Basic 6.0 and Visual Studio 6.0 (with a Modified Date of June 22,1998) will not install properly if used in a redistribution scenario. Not all of the files required to use the RDS and ADOR technologies were included in the file. This means that if you use this file to redistribute these technologies onto a clean machine, those technologies will not work on that machine.

If you distribute MDAC20.Cab to a machine that does not have all of the MDAC 2.0 components installed, applications that use MDAC 1.5 components will no longer function properly.

The MDAC_Typ.Exe file included with Visual Basic 6.0 and Visual Studio 6.0 will install all of the MDAC 2.0 components, including RDS and ADOR. If all of the MDAC 2.0 components are installed prior to installing RDS and ADOR via the MDAC20.Cab file, an application that requires RDS and/or ADOR will function properly.

Installing all of the MDAC 2.0 components via MDAC_Typ.Exe after attempting to install RDS and ADOR via MDAC20.Cab will properly install the MDAC 2.0 components and ensure that applications that use either the 1.5 or 2.0 version of the MDAC components will function properly.

STATUS

MORE INFORMATION

The Visual Basic Package and Deployment Wizard that ships with Visual Studio 6.0 and Visual Basic 6.0 will use MDAC20.Cab if you reference ADOR and/or RDS but not ADO, RDO, DAO, the ADO Data Control or the Data Environment. To make sure that the Wizard uses MDAC_Typ.Exe instead of MDAC20.Cab, change the following entries in the VB6Dep.Ini file:


   [MSADOR15.dll]
   Dest=$(CommonFilesSys)\ADO
   Replace Conditional=mdac_typ.exe
   CABFileName=mdac20.cab
   CABDefaultURL=http://activex.microsoft.com/controls/vb6
   CABINFFile=mdac20c.inf

   [MSADCO.dll]
   Dest=$(CommonFilesSys)\MSADC
   Replace Conditional=mdac_typ.exe
   CABFileName=mdac20.cab
   CABDefaultURL=http://activex.microsoft.com/controls/vb6
   CABINFFile=mdac20c.inf

to:


   [MSADOR15.dll]
   Dest=$(CommonFilesSys)\ADO
   Replace=mdac_typ.exe
   CABFileName=mdac_typ.cab
   CABDefaultURL=http://activex.microsoft.com/controls/vb6 
   CABRunFile=setup.exe

   [MSADCO.dll]
   Dest=$(CommonFilesSys)\MSADC
   Replace=mdac_typ.exe
   CABFileName=mdac_typ.cab
   CABDefaultURL=http://activex.microsoft.com/controls/vb6 
   CABRunFile=setup.exe

The RISC and localized versions of the Visual Basic Package and Deployment Wizard shipped with an updated version of the VB6Dep.Ini file contains these changes.

Additional query words: kbVBp600bug kbDSupport kbdse kbMDAC200 kbVS600bug kbvbp kbrds kbDeployment kbPDWizard kbDatabase


Keywords          : kbDatabase 
Version           : WINDOWS:2.0,6.0
Platform          : WINDOWS 
Issue type        : kbbug

Last Reviewed: May 26, 1999