• Hi, did you find a solution?

    I am also having this problem while trying to upload AP_OpticalFlow_test.pde to my board (ardupilot 2.6).

    I have the Arduino version ArduPilot-Arduino-1.0.3-windows. I have set a project folder as my sketchbook and have placed in that folder the folders from ArduCopter-3.0.1

    Any help much appreciated!

  • which version of Arduino are you using?  you need the Arduino-1.0.3 in order to select the specific APM board. Also, your libraries may be in the wrong place. Hope this helps!

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