extract preview image from CR2

[jimmyiiiphoto]

My CR2 image is not showing a preview in the finder window and when I ran this script I get an error.

First I ran this in Terminal on mac:
Image-ExifTool-10.00/exiftool -PreviewImage -b jimmy2.CR2 > Canon_JFR.JPG

Then this pops up:
Error: File format error - jimmy2.CR2

I really need these images from a wedding I just shot and hope there's a way to at least get a jpeg from the CR2.

Any help would be greatly appreciated.

I attached the zipped up CR2 image.

[Phil Harvey]

This file is only 26 kB.  There is not enough data for a raw image here.

- Phil

[jimmyiiiphoto]

I have the image compressed as a zip file.

After I extract the image, my computer is showing the file as 27.5 MB.

Is this correct?

Thanks

[Phil Harvey]

The raw data shouldn't compress well.  The compressed file should also be around 25 MB.  Is it?

- Phil