SCN 4716 introduced a new garbage collection method to move the deletion of Queue records to the low priority PEG graphics task from the high priority press tasks.

The function that deletes the records was written with the assumption that it would always be protected from other tasks with an Eclipse locking semaphore. The Queue chain does not have an Eclipse Locking semaphore so the garbage collection software was not being protected from the higher priority Run Task as it was adding records to the queue chain