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Telerik Reporting R1 2019 fails to load assembly DocumentFormat.OpenXml 2.7.2+


Product Version
Product Progress® Telerik® Reporting


If DocumentFormat.OpenXML version 2.7.2 or higher is referenced in an application, the OpenXML rendering extensions are not available in the report viewers or an exception is thrown when a report is being programmatically exported to any OpenXML format.

Note: The issue is fixed in internal build


Remove the current OpenXML references:

  • DocumentFormat.OpenXml version 2.7.2 or higher
  • Telerik.Reporting.OpenXmlRendering.2.7.2.dll

Add references to the following assemblies:

  • DocumentFormat.OpenXml version prior to 2.7.2 (i.e. 2.0.5022.0 - 2.5.5631.0)
  • Telerik.Reporting.OpenXmlRendering.dll

See Also

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