I would start by looking at the contents of that file with a text editor, see 
if there is any XML in it. (Note: you may need to convert the file from a Zip 
package before you can do that, or use a Mac and BBEdit (which can read "into" 
Zipped formats like ePub and XSLX and show the plain-text contents therein). 
The Excel-reading gems that I know of only work on "modern" Excel, the 
XML-based formats. I've not heard of this XSLB format before, could it mean 
that it's a binary file? You should know when you look in the package. If it 
does turn out to be that, you may need to use something like OpenOffice or a 
Windows server and COM objects to deal with it.

Walter

> On Dec 27, 2016, at 8:19 PM, Rafi A <rafigl...@gmail.com> wrote:
> 
> Hi,
> 
> I am using ROO gem on my application for parsing excel files. Now I got an 
> scenario to parse xlsb file but that gem throws me an error. Also I have 
> tried with Creek, spreadsheet gems to parse the xlsb file but no luck.
> 
> Is there a way to do that in Rails then please let me know.
> 
> Regards,
> Seeni Rafiyullah Khan A,
> P Please consider the environment before printing this email
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