I'm on Ubuntu 16.10 [kde]. I have a QIDI Tech I. W/ the makerbot sw, i can use the serial port. W/ the Simplify3D sw I cannot use the serial port. I am in the 'dialout' group (which /dev/ttyACM0 is 660 root:dialout). I have also tried with 'sudo' I have also tried chmod 666 /dev/ttyACM0 The error gi...