Maybe you were ill, preventing you from submitting? Or you did submit but ended up ill for the oral exam? Maybe a group member got ill?
Maybe you just chose to not hand in or attend the oral exam due to other reasons of your own.
In either scenario you have a re-exam. Keep reading for all the details.
Remember you need to be sure if you are registered for the re-exam, see here for info on how registration for re-exams run.