Need Help Inability to print to Graphtec CE6000 from Mac Mojave using Illustrator and Cutting Master 4

I have two Macs that need to print to our Graphtec CE6000-120. We print through an Ethernet to serial device to the serial port on the Graphtec. One system works fine using an earlier version of Mac OS. The other user recently updated to Mojave 10.14.1 and has been unable to print to the Graphtec since. I know using the network device adds a level of complexity but has worked well. Contacted Graphtec support but they were unable to help due to the Ethernet direction. It seems there should be some logging or something I can review on the client to tell what is going on. Any help is appreciated.