FIX: Msadco.dll Update to Address Access Violation in Devenv.exe (200244)


The information in this article applies to:

  • Microsoft Visual InterDev 6.0
  • Microsoft Data Access Components 2.0, when used with:
    • the hardware: Intel x86
  • Microsoft Data Access Components 2.1 SP2, when used with:
    • the hardware: Intel x86
  • Microsoft Visual J++ 6.0
This article was previously published under Q200244

SYMPTOMS

Random crashing may occur with Visual InterDev 6.0 and MDAC 2.0 when you edit Active Server Pages (ASP) or HTML pages that have HTML <OBJECT> references to Remote Data Service (RDS) DataControl objects (CLSID:BD96C556-65A3-11D0-983A-00C04FC29E33). Here is a sample error message:
DEVENV.EXE Exception: access violation (0xc0000005), Address: <address>

CAUSE

This problem occurs because the development shell is performing some design-time calls to ADO/RDS when it encounters the DataControl object. ADO/RDS attempts to access an asynchronous thread that has been shut down by ADO/RDS.

RESOLUTION

To resolve this problem, install MDAC version 2.1 or later. For information on obtaining the latest version of MDAC, see the following Microsoft Web site:

http://msdn.microsoft.com/dataaccess

To work around this problem, see the following article in the Microsoft Knowledge Base:

200683 BUG: Visual InterDev 6.0 or Visual J++ 6.0 Crash When You Edit HTML with RDS Objects

The QFE is a .zip file that contains the updated Msadco.dll.

This hotfix is engineered to work with MDAC build 2.0 SP1 and should only be applied to this specific build. To verify the build of MDAC, check the internal version number of Mdado15.dll, which should be 2.0.3002.23.

Installation

  1. Locate the Msadco.dll file on the target system.
  2. Check the version number, which should be 2.0.3002.23.
  3. Copy the new Msadco.dll file so that it replaces the existing one.
  4. At a command prompt, type regsvr32 msacdo.dll to register the DLL.
MDAC 2.1 fixes this problem. This QFE should not be applied to older MDAC versions or MDAC 2.1.

STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3, which installs MDAC 2.1. For additional information about Visual Studio service packs, click the following article numbers to view the articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 HOWTO: Tell That a Visual Studio Service Pack Is Installed

To download the latest Visual Studio service pack, visit the following Microsoft Web site:

http://msdn.microsoft.com/vstudio/downloads/updates/

Modification Type:MinorLast Reviewed:12/12/2005
Keywords:kbADO210fix kbBug kberrmsg kbfix kbQFE kbVS600sp3fix KB200244
©2004 Microsoft Corporation. All rights reserved.