Predator CNC Editor unable to send a program to a Fanuc 0M

Predator CNC Editor unable to send a program to a Fanuc 0M

Problem

Able to receive on the PC from the Fanuc 0M, but cannot load a file into the Fanuc; no errors and no LSK flashing. This while using Predator CNC Editor and a USB to Serial device. 

Solution

RTS and DTR must not me checked in Predator CNC Editor communication settings.