Hi there, the problem is in this file AutoPlayTaskManager.java look for it in your java.org.l2jmobius.gameserver.taskmanager folder. Scroll down untill you find this:
// Find target.
MonsterInstance monster = null;
double closestDistance = Double.MAX_VALUE;
TARGET: for (MonsterInstance nearby : World.getInstance().getVisibleObjectsInRange(player, MonsterInstance.class, player.getAutoPlaySettings().isLongRange() ? 1400: 600 ))
{
What you must do now is flip the values to 600:1400 then compile.