Error occurred during exporting ssrs report as pdf

an error occurred during local report processing. Object reference not set to an instance of an object
Thanks in advance

Hi Esha2nk,
According to your description, when you export the report to PDF in BIDS, the error “Export error: An error occurred during local report processing. Object reference not set to an instance of an object.” is thrown out.
Based on the error message, it could cause by that there are hidden groups within the report, or the matrix has multiple columns and rows, and Hidden is set to true in the Visibility properties. So in your scenario, please check those two factors. If
issue persists, please provide report design for our analysis. Besides, would you please tell us which SQL Server version you are using?
Reference:
"An error occurred during
local reporting processing. Object reference not set to an instance of an object."
Object reference not set to an instance of an object
If you have any question, please feel free to ask.
Best regards,
Qiuyun Yu
Qiuyun Yu
TechNet Community Support

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         at oracle.adfinternal.view.faces.renderkit.rich.table.TableRenderingContext.isCurrentCellBanded(TableRenderingContext.java:253)
         at oracle.adfinternal.view.faces.renderkit.rich.table.BaseColumnRenderer.renderDataCellClasses(BaseColumnRenderer.java:1036)
         at oracle.adfinternal.view.faces.renderkit.rich.table.BaseColumnRenderer.renderDataCell(BaseColumnRenderer.java:1149)
         at oracle.adfinternal.view.faces.renderkit.rich.table.BaseColumnRenderer.encodeAll(BaseColumnRenderer.java:103)
         at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
         at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
         at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:415)
         at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2567)
         at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer.renderDataBlockRows(TableRenderer.java:1932)
         at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer._renderSingleDataBlock(TableRenderer.java:1601)
         at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer._handleDataFetch(TableRenderer.java:1003)
         at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer.encodeAll(TableRenderer.java:504)
         at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1369)
         at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
         at org.apache.myfaces.trinidad.component.UIXCollection.encodeEnd(UIXCollection.java:529)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.__encodeRecursive(UIXComponentBase.java:1515)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeAll(UIXComponentBase.java:785)
         at oracle.adfinternal.view.faces.util.rich.InvokeOnComponentUtils$EncodeChildVisitCallback.visit(InvokeOnComponentUtils.java:113)
         at org.apache.myfaces.trinidadinternal.context.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:222)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:378)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:448)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:448)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:448)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:443)
         at org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:326)
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         at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:765)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.__encodeRecursive(UIXComponentBase.java:1515)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeAll(UIXComponentBase.java:785)
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    Hello there,
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    Click Trusted File Location.
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    In External Data, in Allow External Data, click Trusted data connection libraries and embedded.
    Click OK.
    For more information, please see:
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    Another reason is Excel Services returns this error when you query PowerPivot data in an Excel workbook that is published to SharePoint, and the SharePoint environment does not have a PowerPivot for SharePoint server, or the SQL Server Analysis
    Services (PowerPivot) service is stopped. Please check this document:
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    Finally, here is a good article regarding how to troubleshoot PowerPivot data refresh for your reference. Please see:
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    http://social.technet.microsoft.com/wiki/contents/articles/3870.troubleshooting-powerpivot-data-refresh.aspx
    Hope this helps.
    Elvis Long
    TechNet Community Support

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