Excel file wont open in Mac but will in PC - Read Only error.

L

lard

I am trying to open a file on a Mac with Office 2008 which I emailed my self from my PC.
The error says,
'The file may be read-only, or you may be trying to access a read-only location. Or the Server the document is stored on may not be responding'

This feels like a corruption of somesort because I see the file on the Mac is smaller in kb size so must be missing some formatting or something.

Anyone got any help?
Thanks,
 
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