This is all greek to me. MPASM is saying I have a "Aurgument out of range - Using LSB". Line 206 of Mac File.

SUB?CBB macro Cin, Bin, Bout
MOVE?BA Bin
sublw Cin <------- Line 206
MOVE?AB Bout
endm

I have not a clue to what any of this is or what is causing the warning error.
18F4530 PBP 2.46 MPASM

Any hints or clues? Never used MPASM before and it's got me all bent out of shape.
Richard