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  • tty tells you the terminal device that your current terminal session is connected to. Nothing to do with listing what terminal devices are available. Commented Apr 21, 2019 at 15:51
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    You are assuming a problem with serial ports. That is unlikely to be the case. Your real problem is something to do with the Arduino IDE's programming. What version of the IDE are you using and how did you install it? Commented Apr 21, 2019 at 15:53
  • I agree with Majenko and also don't believe it has anything to do with your ports. The exceptions you mentioned look like there is something wrong with your environment, maybe updating the arduino IDE or java itself will help. You could also check if the problem persists when using an older version of the IDE Commented Apr 22, 2019 at 19:18
  • To be sure that has nothing to do with the ports/serial communication, I suggest reading out the atmega with avrdude manually Commented Apr 22, 2019 at 19:19