When you use a two-way receive port to process a Microsoft BizTalk Accelerator for HL7 1.0 message, no acknowledgement message (ACK) is sent back to the source system. This problem occurs if the following conditions are true:

• You use BizTalk Accelerator for HL7 together with BizTalk Server 2004.
• You have installed the hotfix that Microsoft Knowledge Base article 890348 describes.
  
  For more information about this hotfix, click the following article number to view the article in the Microsoft Knowledge Base:
  890348  (http://kbalertz.com/Feedback.aspx?kbNumber=890348/ ) FIX: You receive validation errors from the BizTalk Server Accelerator for HL7 when a message is processed after you define all the declared segments of a particular HL7 schema as "not required"

Additionally, the following events are logged in Event Viewer:

Event 1

Event Type: Error
Event Source: BizTalk Accelerator for HL7
Event Category: None
Event ID: 4097
Description:
Fatal error encountered in 2XDasm. Exception information is Method not found: Boolean Microsoft.Solutions.BTAHL7.Pipelines.AckConfig.get_SynchAckEnabled().

Event 2

Event Type: Error
Event Source: BizTalk Server 2004
Event Category: BizTalk Server 2004
Event ID: 5719
Description:
There was a failure executing the receive pipeline: "BTAHL72XPipelines.BTAHL72XReceivePipeline" Source: "Microsoft.Solutions.BTAHL7.HL72fDasm" Receive Location: "localhost:21000" Reason: Method not found: Boolean Microsoft.Solutions.BTAHL7.Pipelines.AckConfig.get_SynchAckEnabled().

You also receive the following error message in the Health and Activity Tracking (HAT) tool:

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 the following products and software updates installed to apply this hotfix:

• Microsoft BizTalk Server 2004 Service Pack 1
• Microsoft BizTalk Accelerator for HL7 1.0
• The hotfix that Knowledge Base article 890348 describes

Restart requirement

You do not have to restart the computer after you apply this hotfix. You must restart the BizTalk Service BizTalk Group: BizTalkServerApplication service after you apply this hotfix.

Hotfix replacement information

This hotfix replaces the hotfix that Knowledge Base article 890348 describes.

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: