gdsports:
What kind of computer are you using?
Try a different USB cable and and different USB port. USB 3.0 ports may not work so the computer has USB 3.0 ports, try a USB 2.0 hub.
Old computer converted over to Linux. USB 1. FTDI worked fine to program the Ardweeny when this computer was a WinXP box.
Same port and same cable.
Plugged in my Nano again just be sure. Same port, same cable. The Nano showed me dev/ttyUSB0 as an available port and took on a sketch just fine.
Unplugged that, pluggted back in the Ardweeny, USB0 is still there. Curious. Selected it. The Ardweeny took a sketch just fine. No idea what happened but my immediate problem is solved.
Thanks for
Going to save that.
Thanks for your time and effort.