i simulated a layout with p2040 and 5ddr3(4+1ecc) in 1333 mbps i found that all the nets are passing and only dqs is listed in violation dqs 0,1,2,3 are getting failed
and 4,5,6,7 are passing what would be the error
i had obseved all the lines are routed with equal length with respect to the corresponding data lines
when i examined the layout
all the length matching is perfect what would be the reason for this failure?