proteus错误信息：
PROSPICE 8.04.00 (Build 21720) (C) Labcenter Electronics 1993-2017.
Loaded netlist 'C:\Users\lh128\AppData\Local\Temp\LISA4872.SDF' for design '新工程.pdsprj'
[SPICE] Too many iterations without convergence.
Real Time Simulation failed to start.
只要把555的三脚和4017的14角断开就没有问题，为什么啊？
