用speed2000进行ddr的TDR和TDT测试时,一堆如下错误,是什么原因 4 m5 E' J! \% m( M' w) b( L) R; N$ V1 K3 C# f5 V
/ N9 c4 _) J3 A % a; Q+ \# v6 a& g3 y, u0 u: }ERROR [Via Placement]: Via2452::GND at (13.462mm, 54.991mm) with lower node on Plane$GND02 has a placement error 7 N# _4 z. P, z" N $ t5 ?% i. w5 B5 I2 f% K( u& w) F