go to unit then search for ( Combat - Attack 1 -Damage Base ) set it to 0 then ( Combat - Attack 1 -Damage Number Of Dice ) set it to 0 and also ( Combat - Attack 1 -Damage Sides Per Dice ) set it to 0. and here the unit will have no basic attacks. also check if he is using attack 1 or 2 or both and that from ( Combat -Attacks Enabled ) it should be 1-Both, 2- Attack 1 only
3- Attack 2 Only