G33.1 K word missing

Good Afternoon all,

I have the below snippet of Gcode in a larger program, LinuxCNC gives me an error saying that K word missing for G33/G33.1 when i load or run the program.  However, the G33.1 is used on its own in a simple program or in MDI and it works fine.  The program also runs correctly but halts after the g33.1 and does not go back home or switch spindle off etc.

Any thoughts from those more knowledgable in this area?

[code
]N84 T30 M6 G43
N86 G90
N88 M8
N89 S500 M3
N90 G0 X0.0 Z15.0
N91 G0 Z5.0
N94 G33.1 Z-14.5 K1.058
N95 Z15.0
N96 M9
N97 M5
N98 G53 G0 X0.
N99 G53 G0 Z0.
N100 M30
[/code]