FIX: Visual C++ 6.0 Optimizer May Generate Code That Experiences Access Violations

Article translations Article translations
Article ID: 329594 - View products that this article applies to.
This article was previously published under Q329594
Expand all | Collapse all


If you turn on optimizations before you compile code (typically in release mode), Visual C++ 6.0 Optimizer may generate code that causes an access violation when it is executed. The same code works as expected if you turn off optimizations before you compile the code, or if you compile the code by using Visual C++ 7.0 and you turn on optimizations.


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, we recommend that you wait for the next Visual Studio 6.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone 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 typical 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 fix 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
   26-Sep-2002   01:11   12.0.9691.0   737,329   C2.dll


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


Article ID: 329594 - Last Review: October 11, 2005 - Revision: 1.3
  • Microsoft Visual C++ 6.0 Service Pack 5
kbhotfixserver kbqfe kbbug kbfix kbqfe KB329594
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

Give Feedback


Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from