Microsoft KB Archive/942530

= FIX: Error message when you display a parameterized report in a Report Viewer Web part in SQL Server 2005 Reporting Services: &quot;Object reference not set to an instance of an object&quot; =

Article ID: 942530

Article Last Modified on 10/4/2007

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APPLIES TO


 * Microsoft SQL Server 2005 Reporting Services

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Bug: #50001812 (SQL Hotfix)



Microsoft distributes Microsoft SQL Server 2005 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2005 fix release.



SYMPTOMS
Consider the following scenario:
 * You configure SQL Server 2005 Reporting Services to run in the SharePoint integrated mode.
 * You create a document library that has the Allow management of content types option enabled for a SharePoint Web site.
 * You add the following content types to the content type list of the document library:
 * Report Builder Model
 * Report Builder Report
 * Report Data source
 * You create a SharePoint site page in the document library.
 * You add both a Report Viewer Web part and a Document Library List Web part to the new SharePoint site page.
 * You link the two Web parts by using the connection setting.
 * You create a report that has a parameter.
 * You select the report in the document list to display the report in Report Viewer.

When you specify a parameter other than the default parameter, and then you click Apply to use the new parameter to display the report, you receive the following error message:

Object reference not set to an instance of an object.



CAUSE
This issue occurs because a NULL Reference exception occurs when you specify a parameter in a Report Viewer Web part if the Web part is linked to a Document Library List Web part.



RESOLUTION
The fix for this issue was first released in Cumulative Update 4. For more information about how to obtain this cumulative update package for SQL Server 2005 Service Pack 2, click the following article number to view the article in the Microsoft Knowledge Base:

941450 Cumulative update package 4 for SQL Server 2005 Service Pack 2

Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2005 fix release. Microsoft recommends that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

937137 The SQL Server 2005 builds that were released after SQL Server 2005 Service Pack 2 was released

Microsoft SQL Server 2005 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2005 Service Pack 2 hotfix to an installation of SQL Server 2005 Service Pack 2. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about what files are changed, and for information about any prerequisites to apply the cumulative update package that contains the hotfix that is described in this Microsoft Knowledge Base article, click the following article number to view the article in the Microsoft Knowledge Base:

941450 Cumulative update package 4 for SQL Server 2005 Service Pack 2

