Postponements of oral module exams in the Computer Science Master program have recently increased considerably and have lead to a lot of adminstrative manual work on several parts. This is why the central examination office has decided not to accept any more re-registrations for oral exams outside the regular university registration phases, if there was a date fixed before, which was given up. In those cases the student must wait for the next regular registration phase to register for the exam. Please consider this, before you cancel an exam date, which was already fixed.
This regulation does not apply in the case of proven illness (medical certificate) or for exam repetitions after failure. All current regulations concerning registration and de-registration for all exam types are summarized (for the moment only in German) on the FAQ web page of the central examination office. An English version will be available soon.