My version 1.0.3 of the Arduino IDE did not come with an RTCdue library. Nor did my 1.0.4 version. I'm surprised that yours did.
If it didn't, and you downloaded that library, you put it in the wrong place. And, you didn't tell us where you got it.
My version 1.0.3 of the Arduino IDE did not come with an RTCdue library. Nor did my 1.0.4 version. I'm surprised that yours did.
If it didn't, and you downloaded that library, you put it in the wrong place. And, you didn't tell us where you got it.