The Die Test would run a maximum of 9999 cycles before stopping.

9999 cycles is usually enough but during some testing we want to leave it running longer.

The issue was that the Die Test was keeping track of parts that it filled into the queue. It would only fill 9999 parts, which is what the hidden Die Test, test part is programmed to. No production is tracked against this part, keeping track of how many items for this part were filled into the queue was not necessary.