holdLast(var [,num_cycles])

If variable var has a bad status, use the last good value for var instead. If you do not specify the optional num_cycles argument, the last good value is used indefinitely, or until status returns to good. If you specify the num_cycles argument, the last good value is used for at most that number of execution cycles or until status returns to good, whichever comes first. See Transform Combination Restrictions.