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Assume that you have a report in Microsoft SQL Server 2012 Reporting Services (SSRS 2012) or in SSRS 2014 in SharePoint integrated mode. The report contains two datasets that connect to a SharePoint list. When you review the report, you may receive the following error message:

An error has occurred during report processing. (rsProcessingAborted)
Query execution failed for dataset '<DatasetName>'. (rsErrorExecutingCommand)
An item with the same key has already been added.

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:


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

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