Arduino Due uploading error using Eclipse plugin "avrdude: stk500_recv(): programmer is not responding" I have a Arduino Due that I'm trying to upload a sketch to. I follow the tutorial http://playground.arduino.cc/Code/Eclipse to get the board running with the Eclipse plugin. 

However uploading the sketch gives me the error

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x03


If I use the Arduino IDE everthing works fine. I'm using Eclipse mars with Arduino 1.6.5

What could have gone wrong?
avrdude: stk500_recv(): programmer is not responding
  avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x03


There's your clue. 
1) programmer is not responding - This usually means the device isn't connected, or powered, or reachable by the IDE, make sure you have eclipse configured correctly for your device, and it's location.

2) not in sync - This is a redundant, or overlapping error, of course it's not going to sync if it can't connect.