Error message when an application calls the Mfc42u.dll file to load other .dll files on a Windows Server 2003-based system: "Microsoft Visual C++ Runtime Library Runtime Error!"

When an application calls the Mfc42u.dll file to load other DLL files on a Microsoft Windows Server 2003-based system, you receive the following error message on the console session:

Microsoft Visual C++ Runtime Library Runtime Error! Program: This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information.

If this error message is not closed on the console session, the affected application stops responding (hangs).

This issue occurs because the Mfc42u.dll file unexpectedly generates a dialog box in the console session when the Mfc42u.dll file cannot load a .dll file. This dialog box contains the error message that is mentioned in the "Symptoms" section.

An administrator can log on to the console session to close the dialog box that is mentioned in the "Cause" section.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

Because of file dependencies, this hotfix requires Windows Server 2003 Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.

Windows Server 2003 with Service Pack 1, x86-based versions

Windows Server 2003, x64-based versions

Windows Server 2003 with Service Pack 1, IA-64-based versions

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

After you apply this hotfix, the Mfc42u.dll module no longer generates an error message.