im facing the attached problem when uploading the code to my Arduino due board
Hi. This was also reported here:
http://forum.arduino.cc/index.php?topic=507661.msg4105620#msg4105620
The Arduino Web Editor developers are aware of the issue. For now, you cannot use the Due with the Arduino Web Editor. You'll have to use the standard Arduino IDE while you wait for the Due to be supported. You can download the standard Arduino IDE for free here: