Hi, Jlautomatio & Brian
If Mach3 & LC reside in other than Mach3 folder, like Mach3R2.0.010.
The Gcode post's to Mach3R2.0.010\ gcodetest55Dotpolyline.tap, rather than Mach3R2.0.010\gcode\test55Dotpolyline.tap.
Need's a back-slash gcode " \" test55Dotpolyline.tap is missing.
Thank's Chip