Symptoms
Consider the following scenario:
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You have a Reporting Services report that contains a tablix data region.
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There are merged cells in the tablix data region.
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You try to export the report in a PDF format.
In this scenario, the export fails, and you receive the following series of error messages:
An error occurred during local report processing.
An error occurred during rendering of the report.
An error occurred during rendering of the report.
Object reference not set to an instance an object.
Additionally, if you check the Reporting Services log file, you find the following errors:
library!ReportServer_0-1!b4c!11/14/2013-10:11:27:: i INFO: RenderFromSession('/ReportFolder1/Report1') reportrendering!ReportServer_0-1!b4c!11/14/2013-10:11:29:: e ERROR: Throwing Microsoft.ReportingServices.ReportProcessing.UnhandledReportRenderingException: , Microsoft.ReportingServices.ReportProcessing.UnhandledReportRenderingException: An error occurred during rendering of the report. ---> Microsoft.ReportingServices.OnDemandReportRendering.ReportRenderingException: An error occurred during rendering of the report. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.UpdateTopItemKT(PageItem topItem, RowInfo rowInfo, PageDetailCell currCell) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateDetailCell(Tablix tablix, TablixMember colMemberParent, Int32 colGridIndex, RowInfo rowInfo, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.TraverseColumnMembers(Tablix tablix, TablixMember colMemberParent, Int32 parentColIndex, RowInfo currRowInfo, Boolean create, Double startInTablix, Double endInTablix, Int32& detailCellIndex, Int32& visibleSpan, List`1 detailCellsState, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.TraverseColumnMembers(Tablix tablix, TablixMember colMemberParent, Int32 parentColIndex, RowInfo currRowInfo, Boolean create, Double startInTablix, Double endInTablix, Int32& detailCellIndex, Int32& visibleSpan, List`1 detailCellsState, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateDetailRow(Tablix tablix, TablixMember rowMemberParent, Int32 parentRowIndex, Int32 parentColIndex, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateRowMemberChildren(Tablix tablix, TablixMember rowMemberParent, Int32 defTreeLevel, Boolean parentBorderHeader, Int32 parentRowIndex, Int32 parentColIndex, Int32 sourceIndex, Boolean resetContext, Boolean parentHasFooters, LevelInfo parentLevelInfo, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateRowMemberChildren(Tablix tablix, TablixMember rowMemberParent, Int32 defTreeLevel, Boolean parentBorderHeader, Int32 parentRowIndex, Int32 parentColIndex, Int32 sourceIndex, Boolean resetContext, Boolean parentHasFooters, LevelInfo parentLevelInfo, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateTablixRows(Tablix tablix, TablixMember rowMemberParent, Int32 defTreeLevel, Boolean parentBorderHeader, Int32 parentRowIndex, Int32 parentColIndex, List`1& pageStructMemberCell, Boolean ignoreTotals, Boolean& finishLevel, Boolean parentHasFooters, CreateItemsContext createItems, Double startInTablix, Double endInTablix, PageContext pageContext) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateTablixItems(Tablix tablix, PageContext pageContext, CreateItemsContext createItems, Double startInTablix, Double endInTablix) at Microsoft.ReportingServices.Rendering.HPBProcessing.Tablix.CreateV
Resolution
The issue was first fixed in the following cumulative update of SQL Server.
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
See the terminology Microsoft uses to describe software updates.
