FIX: Error message when you use Microsoft OLE DB Provider for DB2 to run Transact-SQL statements in Host Integration Server 2004 and in Host Integration Server 2006: �Number of host variables not valid�

In a Microsoft Host Integration Server 2004 environment, you use Microsoft OLE DB Provider for DB2 to run Transact-SQL statements. The statements contain UNION and COUNT aggregates, and variable parameters. In this scenario, you receive an error message that resembles the following:
Notes

• This issue does not occur if the Transact-SQL statements do not contain a COUNT aggregate. Additionally, this issue does not occur when the first statement uses a variable parameter, and the second statement uses a fixed parameter.
• This issue also occurs in Microsoft Host Integration Server 2006.

Service pack information for Host Integration Server 2006

To resolve this problem, obtain the latest service pack for Host Integration Server 2006. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix information for Host Integration Server 2004

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. 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.

Prerequisites

You must have Host Integration Server 2004 installed to apply this hotfix.

Restart information

You do not have to restart the computer after you apply this hotfix.

Registry information

You do not have to change the registry.

Hotfix Replacement information

This hotfix does not replace any other hotfixes.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain of all the files that you must have to fully update a product to the latest build. 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.

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

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