064 SHAPE PROGRAM NOT MONOTONOUSLY. What is this meant?
G00 Z.1
X4.51
G71 U0400
G71 P100 Q200 U0100 W0 F.01
N100 G00 X4.224
G01 Z0 F.005
G03 X4.275 Z-.025 R.025 F.002
G01 X4.2725 Z-3.7114 F.004
X4.4934 Z-3.9026
G03 X4.5 Z-3.9151 R.025 F.002
N200 G01 Z-4.1 F.004
G70 P100 Q200
What missing in the program?