The connection to the Board failed. This tool can try to fix the issue by disabling and re-enabling the related device.
The compiler produces a number of object files (files with an extension of .o that will be combined by the link tool). These files are stored in /tmp on Mac and Linux. On Windows, they are in the applet directory (a folder below the Arduino install directory). The object files are then linked together to make a hex file to upload to the board. Avrdude, a utility for transferring files to the Arduino controller, is used to upload tothe board.