I thought it was gone but the USB issue is still there. I checked the connections at the power supply and the G540 is connected to a different COM connection on the power supply, if that matters. I've tried different USB cables and moved the connection to several different ports on the computer but none of that seems to matter. Anyway, I have also asked for comment from CNCDRIVE and though an auto response came I haven't heard a real response from them for several days. (holiday?)
I'm wondering if they'll let me exchange the UC100 for the 400ETH through Automation. Its getting frustrating. When the connection is lost, I have to shutdown the computer and it doesn't want to complete. It just hangs during shutdown and I have to pull the power cord to the computer to finish the shutdown and reboot to try again. This can happen several times before I get any real operation time. If I'm lucky enough to spend a decent amout of time operational and the connection remains good time I shutdown, the computer finishes the shutdown as expected. It appears the computer get pissed when the UCCNC-UC100 connection fails.