正在学习PT,运行结果提示:
the arc between pins 'CK' and 'D' is negative, which is not allowed. To make it positive, the maximum hold value has been adjusted from 0.729405 to 0.782819.
请问:1. 修改那里,才能保证是正值。
2. 有没有可能是时序约束没有写好造成的,和设计无关呢?
3. the maximum hold value has been adjusted from 0.729405 to 0.782819. 是已经自动修改过的意思吗?