Once happened to me that I made print, and after fixing and washing, image on paper wanished. So I prepared fresh developer, again made print, and again image dissapear. After few prints, and starting to belive in ghosts, I finally discovered: I earlier poured fixer out of bottle and poured water in bottle to wash the bottle. So I fixed prints with ordinary watter...
In your case vinny there are three answers:
1. You wrongly loaded film in camera, that is when you loaded film you turned it 180 degrees, so paper side of roll was turned to lens, film side of roll was turned to back of camera. So, when you made exposure, you didn't expose film (emulsion), you exposed backpaper of film. That happened to me once when loaded my Mamiya RBproS magazine... But, saying that even frame numbers are not visible, next two answers are more likely (altough not must, beacuse with EFKE film strange things happened in past, so, who knows why there are no frame numbers...
2. Your film wasn't developed for whatever reason, Daves answer is most likely so instead developer you used fixer or stop bath (if you use it) as first chemical, then one of next two chemicals again (second time), stop bath (if any) or fixer
3. That particular roll of film was not correct, for whatever reason (manufacturing error, exposed to light because of light leaking, or something else, see last part about EFKE films from point 1

.
P. S. I have nothing against EFKE films, I used EFKE films, it is great film, but sometimes strange things happened. To me, and I know other people too who had strange things with EFKE...