Well, if nobody casts a vote for a candidate in that race, then nobody is elected to that position and you have an incomplete election. If the sole nominee is so unpopular and there are no nominees from the floor and no write in ballots, I guess it is conceivable that everyone just abstains from voting in that race. Somebody has to receive at least one vote in order to be elected. I'm betting, though, that the sole nominee will vote for himself. If the election isn't completed before the term of the current office holder expires, then, depending on the precise wording in your bylaws about terms of office, the current officer may may not continue in office until a successor is elected.
