ID:176674 Following <number> pins are differential I/O pins but do not have their complement pins. Hence, the Fitter automatically created the complement pins.

CAUSE: The Fitter is reporting that differential I/O pins exist in the design, but the complementary pins does not exist. As a result, the Fitter created the complementary pins for the differential I/O pins.

ACTION: No action is required. To avoid receiving this message, use the differential buffer primitives to create both the positive and negative pins of a differential pin pair.