//Prevent others from opening the door (in this case barrel)
//Put this script OnOpen
void main()
{

object oPC = GetLastOpenedBy();
object oSelf = OBJECT_SELF;


if (!GetIsPC(oPC)) return;

//If you don't have the key go away!
if (GetItemPossessedBy(oPC, "barrel2")!= OBJECT_INVALID)
   return;
   {
   AssignCommand(oPC, ClearAllActions());
   AssignCommand(oPC, ActionMoveAwayFromObject(oSelf));
   }

}