ID:170124 Detected DDIO low registers in unexpected configurations. Incorrect use of DDIO assignments may create unroutable designs

CAUSE: The Fitter detected DDIO low registers in unexpected configurations. The Fitter may not be able to route this design due to this problem, or it may produce information messages about unsatisfiable routing constraints.

ACTION: Use the ALTDDIO_OUTPUT or ALTDDIO_BIDIR megafunctions, or the ALTDQS and ALTDQ megafunctions when designing a memory interface for the DDIO components in the design.