Hi, Let me add few more comments on your topics,Originally posted in cdnusers.org by mohanch007
The alternative way other then adding in script file is by setting the same in CTSMode "setCTSMode -setDPinAsSync " before loading ctstch script file.
Then this is global for all the other CTS trees.
Its allways adviceble to set soft rule for Preferred layers like avalable top metals (M5 , M4 ) in setCTSMode command .
like ( setCTSMode -topPreferredLayer M4 -bottomPreferredLayer M3 ) .
BTW how was your correlation of skew and delay between clk- route only and post route phase.