circular interpulation help needed

[WarOzz]

I am trying to circular interpolate an internal groove on a Cincinnati Horizontal, I keep getting errors related to the exit line. Does anyone happen to have an example code I can look at that might help me out. I am trying to learn to do this out of the old manual and it's just not working the way it's described.

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[JordanMach]

Here is a code from my machine on a 1250C Vertical Mill with A2100 Control. May be similar? Never used a Horizontal to be honest.

(MSG, .481 MILL)
(MSG, .498 C BORE H1)
: G17 G40 G70 G80 G90 G94
: T4 M6
M8
G0 G90 H1 X2.6586 Y-1.454 S5000 M3
Z.25
Z.1
G1 Z-.7705 F15.
G42 X2.6724 F8.
G3 X2.663 Y-1.4446 P.0094
X2.6536 Y-1.454 P.0094
X2.663 Y-1.4634 P.0094
X2.6724 Y-1.454 P.0094
G1 X2.6586
Z-1.541 F15.
X2.6724 F8.
G3 X2.663 Y-1.4446 P.0094
X2.6536 Y-1.454 P.0094
X2.663 Y-1.4634 P.0094
X2.6724 Y-1.454 P.0094
G1 X2.6586
X2.6724 F8.
G3 X2.663 Y-1.4446 P.0094
X2.6536 Y-1.454 P.0094
X2.663 Y-1.4634 P.0094
X2.6724 Y-1.454 P.0094
G1 G40 X2.6586
G0 Z1.