title: How to solve this arduino error-error: pins_arduino.h: No such file or directory
body: <p>how do I solve  this error on my Arduino sketch,</p>
  
  <p>In file included from sketch_feb14a.cpp:20:
  G:\arduino-1.0-windows_2\arduino-1.0\hardware\arduino\cores\arduino/Arduino.h:212:26: error: pins_arduino.h: No such file or directory</p>