Well Hell!
I was running the old trusty (mostly) 770 today, and my G84 Tapping cycle glitched-out on me.
I thought PATHPILOT was supposed to fix the G84 gremlins?
(G84 X0. Y0. Z-.5 R.2 F50. P1.)

The spindle started, fed down to -.5 … Then stopped.
No spindle reverse, no feeding up... Nothing!

UH OH !!!!!! Luckily I was dry-running the program, without a part in the vise.
I had to reset the program, turn the spindle on manually (To make sure the spindle wasn't dead), and try again.

Nope!! died again...
So, I had to go back to the old MACH3 style, long-hand programming with the feed in, pause, reverse, feed out, etc.
Long-hand program worked like a charm.

Maybe it's something to notify TORMACH about?