It could have been adverted...
...by the refs, but not necessarily. Let's say Purdue has 12 guys warming up when ref is counting players and also checks that 12 names and numbers are listed in the book and signs off on it. Suppose Purdue normally has 13 players, but in this game #10 (Smith) is injured and in street clothes on the bench. An assistant coach or manager assigned with getting the lineup in the book is copying from last game when Smith played and lists him but mistakenly leaves off #5 (Jones). The ref has no knowledge of which players are which (and is not supposed to) and simply sees 12 listed and 12 warming up. All players are in warmups with no numbers showing and even if ref could see numbers, he doesn't go that far checking the book. Games gets started and sometime during, #5 comes in game. Game is stopped, #5 has to be added to book, T on Purdue. Not the officials responsibility for this infraction.