我在maxplus中用74379画电路图,当选中Design Doctor进行仿真时总会出现下面的错误,不知道这是什么原因
Design Doctor Waring:Unknown combinatorialfeedback structure detected at primitive`|74279:1|:27`
Design Doctor Waring:Unknown combinatorialfeedback structure detected at primitive`|74279:1|:28`
Design Doctor Waring:Unknown combinatorialfeedback structure detected at primitive`|74279:1|:16`
Design Doctor Waring:Unknown combinatorialfeedback structure detected at primitive`|74279:1|:13`