Microsoft KB Archive/927022

= FIX: Error message when you compile a project in Visual Studio .NET 2003: &quot;BC31091 Import of type ' ' from assembly or module ' ' failed&quot; =

Article ID: 927022

Article Last Modified on 9/21/2007

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APPLIES TO


 * Microsoft Visual Studio .NET 2003 Professional Edition
 * Microsoft Visual Studio .NET 2003 Enterprise Architect
 * Microsoft Visual Studio .NET 2003 Enterprise Developer
 * Microsoft Visual Studio .NET 2003 Academic Edition

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SYMPTOMS
Consider the following scenario. In Microsoft Visual Studio .NET 2003, you have a Microsoft Visual Basic Class Library project. In the Visual Basic Class Library project, a base class uses a type that is defined in a derived class. You use the Visual Basic Class Library project in a second project. Then, you perform one of the following operations:
 * You compile the second project by using the Visual Studio .NET 2003 IDE.
 * You compile the second project by using the command-line compiler (Vbc.exe).

In this scenario, you receive the following error message:

BC31091: Import of type ' ' from assembly or module ' ' failed



CAUSE
This problem occurs because of a problem in the Visual Basic .NET 2003 compiler.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only 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 .NET 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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.

This hotfix includes the following packages:
 * A package for Visual Studio .NET 2003
 * A package for the Microsoft .NET Framework 1.1 that is running on Windows Server 2003
 * A package for the .NET Framework 1.1 that is running on a version of Microsoft Windows that is not Windows Server 2003

To resolve the problem that occurs when you compile the project by using the Visual Studio .NET 2003 IDE, apply the package for Visual Studio .NET 2003.

To resolve the problem that occurs when you compile the project by using the command-line compiler, apply one of the following packages:
 * If the computer is running Windows Server 2003, apply the package for the .NET Framework 1.1 that is running on Windows Server 2003.
 * If the computer is running a version of Windows that is not Windows Server 2003, apply the package for the .NET Framework 1.1 that is running on a version of Windows that is not Windows Server 2003.

Prerequisites
You must have Visual Studio .NET 2003 Service Pack 1 (SP1) and the .NET Framework 1.1 Service Pack 1 (SP1) installed to apply this hotfix.

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.

The .NET Framework 1.1 that is running on a version of Windows that is not Windows Server 2003


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about software update terminology, 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

Keywords: kbexpertiseadvanced kbpubtypekc kbqfe kbhotfixserver KB927022

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