Basic 3d line help

I have a MultiCam Pro 102 with a 5 yr old board upgrade, 4.13 ini. on startup. I have run this machine for a lot of years and have just discovered I can't cut an arc in the z axis and I don't know why. Using Mastercam V9 to generate toolpaths. I am not a gcode expert but sure looks right yet the machine cuts an arc with the start and stop in the right spot but flat to the table....sometimes. Other times it says z limit out of bounds with some crazy number like 29" yet nothing in the g code has a z move of 29". The odd part is the job previewer shows it cutting wrong.

Here is the g code for a simple yz arc yet the router will not cut it. Any help would be appreciated.

N100 M90
N102 G90
N104 G70
N106 G75
N108 G97 S10000
N110 G00 T1
N112 G00 Z-2.
N114 G00 X1. Y1.
N116 M12
N118 G00 Z-.1
N120 G01 Z.01 F1.67
N122 G19 G02 Y4. J2.5 K2.01 F3.33
N124 G01 Z-.1 F1.67
N126 G00 Z-2.
N128 M22
N130 G00 X0. Y0.
N132 M02