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SSRS reports, exporting to EXCEL gives rrRenderingError error


Reporting Services Error
An error occurred during rendering of the report. (rrRenderingError)
An error occurred during rendering of the report.
The type initializer for 'MS.Utility.EventTrace' threw an exception.
Requested registry access is not allowed.


Because maximum number of rows that can be accommodated in an excel sheet is 65536(2^16=No. of items that can be accommodated by a short Integer. As it uses short Integer to refer to each row as a pk).
The 65K row limitation is only for .xls files.  The new OOXML file format (.xlsx or .xlsm) can handle up to 1 million rows.   The Excel renderer in SSRS 2012 supports the new OOXML format. If upgrading SSRS is not an option, there are 3rd party custom renderers such as http://www.officewriter.com/officewriter-for-sql-server-reporting-services.aspx that can export from older versions of SSRS to the .xlsx format. 


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