Import Excel error in NAV 2013

Hi all,

I want o import a excel file(.xlsx) directly into NAV. When I create a new file and then try to import I can able to import but when I try to download the customer excel which is also the same xlsc and same template I am getting error as below.

Microsoft Dynamics NAV

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This message is for C/AL programmers: A call to Microsoft.Dynamics.Nav.OpenXml.Spreadsheet.WorkbookReader.Open failed with this message: The spreadsheet is corrupted. The following error occurred: The attribute 'verticalDpi' has invalid value '0'. The MinInclusive constraint failed. The value must be greater than or equal to 1..

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OK

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any idea whats the cause of this error and how to overcome it.

thanks in advance.

Regards,
chandru.