G84 isn't working for me

Sorry, I know this is pretty basic but I can't find a thing about it. Apparently in the past G84 (float tapping) was not implemented, but according to this it should be working now: (I'm using LinuxCNC 2.7)

linuxcnc.org/docs/2.4/html/gcode_mill_canned.html#r1_6

I can't get it to work. Here's my test code:

(PROGRAM NAME - TOOLPATH GROUP-1)
(DATE=DD-MM-YY - 14-04-18 TIME=HH:MM - 12:48)
(MCX FILE - C:\USERS\DAN\DOCUMENTS\GRABCAD\13905 SCHNIPKE M09575P006 REFURB\T.MCX)
(NC FILE - C:\USERS\DAN\DROPBOX\LINUXCNC\TOOLPATH GROUP-1.NGC)
(MATERIAL - ALUMINUM INCH - 2024)
( T2 | | H2 )
G20
G0 G17 G40 G49 G80 G90
G64 P0.001
T2 M6
G0 G90 G54 X0. Y0. S500 M3
G43 H2 Z1.
G98 G84 Z-.5 R.01 F25.
G80
M5
G90 G0 G53 Z0.
G90 G0 G53 Y0
M30
%

All it does is go to XY, then to the Z R value while spindle rotates clockwise. When it gets to the R value, the spindle stops and the canned cycle ends (does not go to Z -.5) with the rest of the code executed. I have spindle CW, spindle CCW and spindle ON all set up and tested and working in HAL.

What could I be doing wrong?

Thanks,
Dan

It appears not to be working in 2.7 (according to the docs)
linuxcnc.org/docs/2.7/html/gcode/g-code.html#gcode:g83

(You had a link to the ancient 2.4 docs)

It is documented as working in Master:
linuxcnc.org/docs/devel/html/gcode/g-code.html#gcode:g84

It was added in this commit:
github.com/LinuxCNC/linuxcnc/commit/42ff...3c29565323ee1944462e

Thanks, I guess that means it's not working in this version? I knew that was an older version doc I was referencing, I made the assumption that it would be implemented from that time forward. I'm not sure what the other references are telling me (Master and commit), not being a software programmer.

It's not a big problem as I can post in long hand format but of course would be nice if it was working right.

The 2.4 Docs mention it, but it didn't work then. The docs were updated to make that clear.

Master is the development version of LinuxCNC. It is available to use but is not guaranteed to be stable or fully functional.

Okay, I understand now. Thank you.

Dan