FIX: Importing an .msi file or starting a BizTalk application takes a very long time or fails in BizTalk Server

Applies to: BizTalk Server 2009 BranchBizTalk Server 2009 DeveloperBizTalk Server 2009 Enterprise


In Microsoft BizTalk Server, you experience one or more of the following problems:
  • It takes a very long time to import a BizTalk application (.msi file).
  • You cannot import a BizTalk application (.msi file) successfully. Additionally, you receive the following error message:
    Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. (Microsoft.BizTalk.ExplorerOM)
  • It takes a long time to start a deployed BizTalk application.


Cumulative update information

For BizTalk Server 2009, the hotfix that resolves this issue is included in Cumulative Update 1 for BizTalk Server 2009. 

For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base: 

2429050 Cumulative update package 1 for BizTalk Server 2009

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 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.


To apply this hotfix, you must have Microsoft BizTalk Server 2006 or Microsoft BizTalk Server 2009 installed.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace 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.
32-bit version of BizTalk Server 2006
File nameFile versionFile sizeDateTimePlatform
Msgbox_application_logic.sqlNot applicable506,96611-Nov-200912:58Not applicable
64-bit version of BizTalk Server 2006
File nameFile versionFile sizeDateTimePlatform
BizTalk Server 2009
File nameFile versionFile sizeDateTimePlatform


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

More Information

If you experience a similar problem in BizTalk Server 2006 R2, apply the hotfix that is described in KB954814. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
954814 FIX: Importing an .msi file may take a very long time or you may get a "Timeout expired" error

For more information about how to import a BizTalk application, visit the following Microsoft Developer Network (MSDN) Web site: 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 hot fixes