Number of Non Equivalence Points after comparison in LEC Conformal

Hi

I am comparing a RTL(with old memory IP) vs RTL(28 nm memory IP) using Conformal, after the comparison stage, 128 DFF's are reported non equivalent and reported warning like below mentioned.

                 Warning: 3120 DFFs/DLATs have 1 disabled clock port: skipped data cone comparison. 

I May I know How to give pin constraint for clock.