Pin doesnot exist

I have imp003. Can anyone tell me about pin configuration because when I’m initialising pinA it is showing pin does not exist and it is showing the same error for every pin? I have initialised pin A, B, C but every time it is showing pin does not exist. It is not giving me the same error when I wrote pin1, pin2 instead of pinA, pinB. How should I initialize pin number or pin name?

Remember that Squirrel is case sensitive. Use pinF instead of PinF.