Modeled after a working program, my stroke exceeds start position (error 619)
Here's the code, using a .125 radius cutter to cut a deep groove on the OD:

G50 S450
G00 G28 U0
G53 Z-7.
T505
G97 S400 M03
G96 S400 M08
G00 Z1.
G00 X4. Z0.1
G71 P301 P302 D0.02 U0.0 W0.0 F.007
N301 G01 X4. Z0.1
G01 X4. Z0.
Z-.0625
X2.187 Z-0.625
Z-4.063
X4.8
N302 X4.8 Z0.1
G97 S500 M09
G00 G28 U0
G53 Z-7.
M01

Thank you for your help, I'm a recent program graduate and the only person programming and running a brand new st25