FIX: A debug assertion occurs when a Windows Forms control is hosted on an MFC form in Visual Studio .NET 2003

This article has been archived. It is offered "as is" and will no longer be updated.
In Microsoft Visual Studio .NET 2003, if a Microsoft Windows Forms control is hosted on a Microsoft Foundation Classes (MFC) form, a debug assertion occurs at line 955 in the Occcount.cpp file. If you ignore this assertion, an access violation error occurs.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft Visual Studio .NET 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version      Size        File name   --------------------------------------------------------   17-Jul-2003  23:22                   56,223  Afx.h   31-Jul-2003  00:14                  319,746  Eafxis.lib   31-Jul-2003  00:14                  310,120  Eafxisd.lib   31-Jul-2003  00:58  7.10.3211.0   1,060,864  Mfc71.dll   31-Jul-2003  00:17  7.10.3211.0   2,183,168  Mfc71d.dll   31-Jul-2003  00:50  7.10.3211.0   1,048,064  Mfc71u.dll   31-Jul-2003  00:18  7.10.3211.0   2,177,536  Mfc71ud.dll   31-Jul-2003  00:14               16,909,318  Nafxcw.lib   31-Jul-2003  00:14               17,040,404  Nafxcwd.lib   31-Jul-2003  00:14                  129,138  Nafxis.lib   31-Jul-2003  00:14                  132,454  Nafxisd.lib   17-Jul-2003  23:19                    6,073  Objcore.cpp   18-Jul-2003  00:21                   24,323  Occcont.cpp   31-Jul-2003  00:16               17,208,136  Uafxcw.lib   31-Jul-2003  00:16               17,432,170  Uafxcwd.lib
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
More information
For additional information about the terminology that is used to describe Microsoft product updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 824647 - Last Review: 01/17/2015 05:19:58 - Revision: 2.0

Microsoft Visual Studio .NET 2003 Enterprise Architect, Microsoft Visual Studio .NET 2003 Enterprise Developer, Microsoft Visual Studio .NET 2003 Academic Edition, Microsoft Foundation Class Library 4.2

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