ID:18011 Ignored <number> CARRY_SUM primitive(s) -- cannot place fan-out logic in single logic cell

CAUSE: The Quartus Prime software ignored the specified number of CARRY_SUM primitives because they contain fan-out to logic that does not 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 moving the fan-out to the sum output of the CARRY_SUM primitive(s) or simplify the logic that the CARRY_SUM primitive(s) feed.