更改原理图后,进行正标,提示错误:there are errors .see logfile.BackAnnotation.txt.logfile中提示如下:presumably,this design has never been forword annotated in the ICDB environment.BackAnnotation can not proceed。. T& w: r5 K6 x/ ]! Y+ W9 U
请问一下,这是什么原因,应该怎么解决呢?谢谢!' v S' R2 V5 n% _4 n7 n