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No Certainly not. There are members here in this forum who were asked for an interview after the medicals, RPRF and PP request.
From my understanding and what I have read, it is highly unlikely. Most of the time, if an interview is called for after PP request, it is supposed to be more for security clearance issues then the other issues. However, in the end, it is not over till it is over; there will always be a possibility of an interview.