FIX: You receive a NullReferenceException error message after you rehydrate an XLANG orchestration that was running for a long time in BizTalk Server 2006 R2

In Microsoft BizTalk Server 2006 R2, after you rehydrate an XLANG orchestration that was running for a long time, you receive a NullReferenceException error message. Additionally, an event that resembles the following is logged in the Application log:

Event Type: Error
Event Source: XLANG/s
Event Category: None
Event ID: 10046
Description:
An unrecoverable exception (see the 'inner exception' below) has occurred.
Service Name: <Service Name>
Service Id: <Service GUID>
Instance Id: <Instance GUID>

Object reference not set to an instance of an object.

Exception type: NullReferenceException

Source: Microsoft.XLANGs.BizTalk.Engine

When you upgrade to BizTalk Server 2006 R2, some changes occur to the internal objects that are in serialized orchestrations. Therefore, if an orchestration was serialized before you upgraded to BizTalk Server 2006 R2, the orchestration fails when the orchestration is deserialized after the upgrade.

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.

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, submit a request to 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

You must have Microsoft BizTalk Server 2006 R2 installed to apply this hotfix.

Restart requirement

You must restart the computer if the updated file is being used when 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.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: For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

For more information the orchestration rehydration, visit the following Microsoft Web site:

http://msdn.microsoft.com/en-us/library/dd800372.aspx