如何在EDI中给时钟树加shielding
时间：10-02
整理：3721RD
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下面是我的cts脚本，已设定Shielding为VSS，但布线后看到没有给时钟加VSS，请高人指点。=====
RouteTypeName CK1
NonDefaultRule W3S3
PreferredExtraSpace 0
TopPreferredLayer 4
BottomPreferredLayer 3
Shielding VSS
=====
此外，从log文件只看到以下的warning，是不是这个问题引起的，该如何解决?
=====
#WARNING (NRDB-2005) SPECIAL_NET VDD has special wires but no definition for instance-pin connection. This will cause routability problems later.
#WARNING (NRDB-2005) SPECIAL_NET VSS has special wires but no definition for instance-pin connection. This will cause routability problems later.
=====
RouteTypeName CK1
NonDefaultRule W3S3
PreferredExtraSpace 0
TopPreferredLayer 4
BottomPreferredLayer 3
Shielding VSS
=====
此外，从log文件只看到以下的warning，是不是这个问题引起的，该如何解决?
=====
#WARNING (NRDB-2005) SPECIAL_NET VDD has special wires but no definition for instance-pin connection. This will cause routability problems later.
#WARNING (NRDB-2005) SPECIAL_NET VSS has special wires but no definition for instance-pin connection. This will cause routability problems later.
=====
setCTSMode -routeShielding VSS -routeLeafShielding VSS
这个设置了么?