FIX: Error message when you try to build a schema or try to validate a schema in BizTalk Server 2006:

Consider the following scenario:

�	You create a Microsoft BizTalk Server 2006 project.
�	You add an XML Schema definition language (XSD) schema that is named schema D to the project. Schema D defines a type.
�	You add schemas that are named schema B and schema C to the project. Both schema B and schema C import schema D.
�	You add a schema that is named schema A to the project. Schema A imports schema B, schema C, and schema D.

In this scenario, schema A may have three root nodes of the same type. When you try to build schema A or try to validate schema A, you may receive an error message that resembles the following:This problem does not occur in Microsoft BizTalk Server 2004.

Hotfix information

A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

You must have BizTalk Server 2006 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.

File name	File version	File size	Date	Time
Microsoft.biztalk.schemaeditor.extensibility.dll	3.5.1620.0	22,872	31-Aug-2006	21:57
Microsoft.biztalk.tom.dll	3.5.1620.0	850,728	31-Aug-2006	21:57

Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.

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

For more information, click the following article number to view the article in the Microsoft Knowledge Base: