Any update on this? I just setup the unit and have the newest mydmx file for mac (Jan 2020). Got a few scenes setup and have the ports all set up but when I try to write to hardware, I am getting the same error. I am only using a max of 6 buttons and each not having more than 7 dmx channels each. Setup for some very basic pars and lekos on dpdmx20 dimmers.