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Consider the following scenario:

  • You install Microsoft BizTalk 2009 Accelerator for HL7 (BTAHL7) on a computer that is running Microsoft BizTalk Server 2009.

  • You create a receive location. You configure it to use the MLLP adapter.

  • The receive location has a custom pipeline component. You configure it to promote some context properties.

  • You do not deploy the property schema that defines the promoted properties.

  • A message arrives at the receive location.

In this scenario, the MLLP adapter does not log any exception, the message is not suspended, and you are not notified of any error.


This issue occurs because of the design of the MLLP adapter. 

When the pipeline component that uses the MLLP adapter calls the Promote method, the messaging engine does not find a property schema. However, the message engine does not explicitly generate an exception. Therefore, the message is not published later in the process.


Note To resolve this issue, apply the following hotfix. After you apply the hotfix, BizTalk Server uses HL7 Logging Service to log that the message engine did not find a property schema. Therefore, you must run the HL7 Logging Service if you want BizTalk Server to log an entry when a property schema is not found.

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 the problem described in this article. 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 website: 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.


To apply this hotfix, you must have BizTalk 2009 Accelerator for HL7 (BTAHL7) installed. Additionally, you must have the following hotfixes installed:

970492 FIX: A BizTalk host instance consumes lots of memory and processes messages very slowly when BizTalk Server 2009 receives lots of HL7 messages

973909 FIX: Event IDs 5812, 5743, and 5754 are logged when you use BizTalk 2009 Accelerator for HL7 (BTAHL7)

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, you must restart the host instance of BizTalk Server after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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.

For all versions of BizTalk 2009 Accelerator for HL7

File name

File version

File size















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


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

2003907 Information on BizTalk Server hotfixes

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