How to update the mirror value of register

In reply to naveen-y:

hi all,
I am getting both mirrored and desired values. But both are not getting at the same time(mirrored values are getting after some time) and am unable to figure it out. Can some one please help me in this issue.
Thanks in advance.

Please tell me, how did you update mirrored and desired values? With less information you provided, I guess that the mirrored value is updated via bus monitor (explicited predict), then it will take a longer delay comparing to desired value.