Can't save file in an EPS format

Customer sent us an image as a PDF. I am able to import it into Coral X7, manipulate it, change colors, and apply a contour cut line.

When I try and export it and save it as an EPS file.... Coral shuts down.  A box pops up and says "CorelDraw has stopped working"

I can save it as a jpeg and PDF... but not an EPS file.

Also... it shows that the file has been "saved", I can see the saved file, but the size of it is 0 bytes.

Is there possibly some sort of security "thingy bob" in the original PDF file?

Any insight would be appreciated.

Thanks,

SP