Seeing unconstrained path after adding buffer

[pdude]

Hi,

I had a setup violation on many paths so i added a clock buffer in the clock path to a ICG that was going to all those cells after checking that it was not affecting the setup for the next flops and hold also.
i did an add_repeater but now when i am reporting i am getting an unconstrained path.
Why?

 

[rahul.achates]

Is this in place and route ?

 

[ro9ty]

You must have read in sdf file. If you do add repeater after reading SDF and not SPEF it will now not be able to compute new the new delay values because it does not have a table.
Hence, you see it unconstrained.
Please correct me if you are not using SDFs.

Thanks,
ro9ty