ID:18014 Can't place logic feeding CARRY_SUM primitive "<name>" in single logic cell

CAUSE: The specified CARRY_SUM primitive contains fan-in from logic that fails to fit in a single logic cell. All fan-in logic in CARRY_SUM primitives must fit on a single logic cell.

ACTION: Modify the design by simplifying the logic that feeds the CARRY_SUM primitive to contain fewer inputs to the CARRY_SUM primitive.