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Why does Excel think CSV files are SYLK?

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up vote 5 down vote accepted

Your file probably starts with ID; or something similar.`

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Yep, that was it. –  Jonathan Allen Nov 23 '10 at 18:28
What an awful format specification. I've got a .csv file that begins with "IDNUM," and Excel isn't smart enough to read it as a CSV? Oy. –  nmpeterson Sep 18 '12 at 14:29

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