here are the first lines of this certain program.
N5 (File Name = 123dxf on Monday, March 17, 2008)
N10 (Default Mill Post)
N15 G91.1
N20 M5 M9
N25 M6 T1(TOOL Change 3/8 ball mill)
n27 g41
N30 G43 H.025
N35 G0 Z0.0000
N40 M3
N45 X0.6014 Y0.6860
N50 Z0.1000
N55 G1 Z0.0000 F5.00
N60 Y0.7705 F20.00
N65 G2 X0.9002 Y0.6014 I-0.7767 J-1.7213
N70 G1 X0.6014 Y0.6014
etc
now the program was written for a 3/8" cutter
t1 in the table says diam 0.00
when i change that diam to .375
is when i get the error message