I dont understand the steel whip. Is it hand-to-hand weapon or missile weapon?
Steel whip is hand-to-hand combat weapon with special rule. This special rule says that you can use steel whip to make ranged attack (but you still do this attack in hand-to-hand phase) to hit someone who is up to 4 away. There is special note that if model with steel whip is in base contact with enemy, he must attack this enemy he is in base contact with. Explanation of this is: if your model with steel whip is not in Hand To Hand combat in base contact with enemy and there is enemy model within 4 (dont measure! guess if in range, declare you are attacking and the measure) then your model can make this ranged attack.