Excel Property is showing as Book not Workbook

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Aug 11, 2016
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When we are uploading excel using POI APIs, the api is showing error -

"java.lang.IllegalArgumentException: The supplied POIFSFileSystem contained neither a 'Workbook' entry, nor a 'WORKBOOK' entry. Is it really an excel file?"



When we are doing CTRL+S in excel the property gets changed to Workbook.

Please help in rectifying the issue.
 

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