"UNable to cast object of type 'DocumentFormat.OpenXml.Packaging.ChartsheetPart' to type 'DocumentFormat.OpenXml.Packaging.WorksheetPart.'

Question

I am trying to import prepare an Excel file for translation and keep receiving the following error message: "Unable to cast object of type 'DocumentFormat.OpenXml.Packaging.ChartsheetPart' to type 'DocumentFormat.OpenXml.Packaging.WorksheetPart.' I have checked that cell protection is off and have tried deleting the only chart in the file, all to no avail. Does anyone have any suggestions for a workaround?

Paul · Answer

Hi Robert, 
 
There is a KB article for a similar message which suggests the problem could require a repair or installation of your Interop Assemblies for MS Office. 
 
 producthelp.sdl.com/.../3306.html 
 
Maybe this will help you? 
 
Regards 
 
Paul

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"UNable to cast object of type 'DocumentFormat.OpenXml.Packaging.ChartsheetPart' to type 'DocumentFormat.OpenXml.Packaging.WorksheetPart.'