Hi to all the g-code buffs, I really hope you can help on this one.

I make guitars and many of my drawings are very similar with only slight differences.
I have a problem with routing a pocket which I rout all the time in my other g-codes (guitars) the pocket is identical and indentiacally machined etc.

I get the "radius to end of arc differs to start on line #xxx"

if I remove the line below in bold then the code is happy and will load properly, the last line in italics is the problem line.

I have done all the usual remedies for this issue like changing IJ mode to inc in both Mach3 and my post processor..
im at a loss - I rout this pocket on almost every guitar without problems - ive even scrapped all my toolpaths and programmed them again for this particular drawing.

N364 Y-578.975
N366 X-346.525
N368 Y-590.775
N370 X-342.625
N372 G2 X-336.025 Y-597.375 I0. J-6.6
N374 G1 Y-621.775
N376 X-279.233 Y-578.975
N378 G54 F600.
N380 G3 X-266.55 Y-591.025 I12.683 J.65 F1250.

If needs be I will run with the bold line removed but I dont know the consequences of removing it... I think that G54 is my Z axis work offset and 60mm/min is my plunge rate for that operation.

Jaden