Over all versions of Excel and all verions of windows, to the best of my
knowledge, it always works when you use the extension. It doesn't always
work when you don't use the extension. So always use the extension.

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Regards,
Tom Ogilvy

"David" wrote in message
...
Tom Ogilvy wrote

Just for information, that depends on the windows settings. It will
always work with .xls, so suggest always to use .xls.

I see by this that XL version isn't the controlling factor then? I need
the
extension as stated in a 2nd reply to OP.

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David