The 800004FF task error indicates an infinite loop with no Sleeps in one of the running tasks.

This instance was caused by selecting the "Prune the Queue" option in the Manual Shear, "Part Queue Options" window prompt. This option incorrectly calculated that scrap was required for a Hole Detect controller when restarting the part queue. There were compounding problems with the code that adds the scrap, resulting in an infinite loop trying to add zero length scrap parts to remove the miss-calculated scrap.

Two changes were made.

1. No scrap is required on a Hole Count controller.
2. The code adding the scrap was modified to prevent an infinite loop.