There was a potential flaw in the Minimum Hole Space test. There is one flag that indicates that a hole has been detected since the Hole Queue has last been cleared. This single flag was adequate, until we added multiple hole detect queues, required for the KMF machine.

On the KMF machine It is possible that a hole detected on one Queue would cause an erroneous Min-Hole Space test on the other queue, preventing it from detecting a valid hole on the second queue.

Each hole queue now has its own flag so that the first hole on an empty queue will always be valid.