Hello Michel
I have a look on your Gcode ; the pb is that there is a lot of Gcode that Camotics do not understand like:
G60, M51, M20, M83, M28, M29 ... etc
Use a more standard post pro (Like Mach3) to do the simulation, then switch to your Ranc232 postpro to generate the 'real' Gcode for the machine.
++
David